UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-CSRS CERTIFIED SHAREHOLDER REPORT OF REGISTERED MANAGEMENT INVESTMENT COMPANIES Investment Company Act file number 811-04282 Name of Fund: Merrill Lynch Natural Resources Trust Fund Address: P.O. Box 9011 Princeton, NJ 08543-9011 Name and address of agent for service: Robert C. Doll, Jr., Chief Executive Officer, Merrill Lynch Natural Resources Trust, 800 Scudders Mill Road, Plainsboro, NJ 08536. Mailing address: P.O. Box 9011, Princeton, NJ 08543-9011 Registrant's telephone number, including area code: (609) 282-2800 Date of fiscal year end: 07/31/06 Date of reporting period: 08/01/05 - 01/31/06 Item 1 - Report to Stockholders Merrill Lynch Natural Resources Trust Semi-Annual Report January 31, 2006 Merrill Lynch Natural Resources Trust Announcement to Shareholders On February 15, 2006, BlackRock, Inc. ("BlackRock") and Merrill Lynch & Co., Inc. ("Merrill Lynch") entered into an agreement to merge Merrill Lynch's investment management business, Merrill Lynch Investment Managers, L.P. and certain affiliates (including Fund Asset Management, L.P. and Merrill Lynch Investment Managers International Limited), and BlackRock to create a new independent company that will be one of the world's largest asset management firms with nearly $1 trillion in assets under management (based on combined assets under management as of December 31, 2005). The transaction is expected to close in the third quarter of 2006, at which time the new company will operate under the BlackRock name. As a result of the above transaction, the combined company is expected to become the investment adviser of the Trust, contingent upon the approval of the Trust's Board of Trustees and Trust shareholders. Portfolio Information as of January 31, 2006 Percent of Ten Largest Equity Holdings Net Assets - -------------------------------------------------------------------------------- EnCana Corp. ........................................................ 4.1% EOG Resources, Inc. ................................................. 4.1 Murphy Oil Corp. .................................................... 3.2 Devon Energy Corp. .................................................. 2.9 Apache Corp. ........................................................ 2.2 Talisman Energy, Inc. ............................................... 2.2 GlobalSantaFe Corp. ................................................. 2.0 Transocean, Inc. .................................................... 2.0 National Oilwell Varco, Inc. ........................................ 1.9 BJ Services Co. ..................................................... 1.9 - -------------------------------------------------------------------------------- Percent of Geographic Allocation Total Investments - -------------------------------------------------------------------------------- United States ........................................... 60.1% Canada .................................................. 23.4 France .................................................. 2.4 China ................................................... 1.1 Italy ................................................... 1.0 Australia ............................................... 1.0 Hong Kong ............................................... 0.6 Brazil .................................................. 0.5 South Africa ............................................ 0.4 United Kingdom .......................................... 0.3 Norway .................................................. 0.2 Other* .................................................. 9.0 - -------------------------------------------------------------------------------- * Includes portfolio holdings in short-term investments. 2 MERRILL LYNCH NATURAL RESOURCES TRUST JANUARY 31, 2006 A Letter From the President Dear Shareholder After "muddling through" most of 2005, the financial markets saw increased volatility in January that resulted in a roller coaster of highs and lows for stocks and a similar ride for bonds. In the end, the major market indexes managed to post positive returns for the current reporting period: Total Returns as of January 31, 2006 6-month 12-month ======================================================================================= U.S. equities (Standard & Poor's 500 Index) + 4.68% +10.38% - --------------------------------------------------------------------------------------- Small-cap U.S. equities (Russell 2000 Index) + 8.50 +18.89 - --------------------------------------------------------------------------------------- International equities (MSCI Europe, Australasia, Far East Index) +18.31 +22.76 - --------------------------------------------------------------------------------------- Fixed income (Lehman Brothers Aggregate Bond Index) + 0.84 + 1.80 - --------------------------------------------------------------------------------------- Tax-exempt fixed income (Lehman Brothers Municipal Bond Index) + 1.33 + 2.83 - --------------------------------------------------------------------------------------- High yield bonds (Credit Suisse High Yield Index) + 1.40 + 3.59 - --------------------------------------------------------------------------------------- The Federal Reserve Board (the Fed) advanced its monetary tightening campaign with eight quarter-point interest rate hikes in 2005 and another on January 31, 2006. This brought the federal funds rate to 4.5%. Notably, Ben Bernanke replaced Alan Greenspan as Fed chairman in January, a month after the central bank removed the critical word "measured" from the description of its interest rate-hiking program. Still, most observers expect another rate increase in March. Stocks recorded their third straight year of positive performance in 2005 despite struggling amid rising interest rates, record-high oil prices and a devastating hurricane season. U.S. equities found support in strong corporate earnings, low core inflation and healthy company balance sheets. Strength in the global economy and non-U.S. equity markets helped, as did robust dividend-distribution, share-buyback and merger-and-acquisition activity. International markets, in the meantime, continued to benefit from strong economic statistics, trade surpluses and solid finances. In the U.S. bond market, short-term interest rates continued to move higher as longer-term rates advanced more moderately, resulting in a flattening yield curve. We saw the curve invert temporarily at the end of December and again at the end of January into early February, with the two-year Treasury note offering a slightly higher yield than the 10-year note. Looking ahead, the largest questions center on the Fed's future moves, the consumer's ability (or inability) to continue spending, the direction of the U.S. dollar following a year of appreciation and the potential for continued strong economic and corporate earnings growth. As you consider how these factors might impact your investments in 2006, we encourage you to review your goals with your financial advisor and to make portfolio changes, as needed. For additional insight and timely "food for thought" for investors, we also invite you to visit Shareholder magazine at www.mlim.ml.com/shareholdermagazine. As always, we thank you for trusting Merrill Lynch Investment Managers with your investment assets, and we look forward to continuing to serve your investment needs. Sincerely, /s/ Robert C. Doll, Jr. Robert C. Doll, Jr. President and Trustee MERRILL LYNCH NATURAL RESOURCES TRUST JANUARY 31, 2006 3 A Discussion With Your Fund's Portfolio Manager The Trust considerably outperformed the broad-market S&P 500 Index, as energy-related stocks, where we are focusing our investments, continued to lead the market. How did the Trust perform during the period in light of the existing market conditions? For the six-month period ended January 31, 2006, Merrill Lynch Natural Resources Trust's Class A, Class B, Class C and Class I Shares posted total returns of +29.79%, +29.29%, +29.31% and +29.98%, respectively. (Fund results shown do not reflect sales charges and would be lower if sales charges were included. Complete performance information can be found on pages 6 and 7 of this report to shareholders.) For the same period, the Trust's benchmark, the Standard & Poor's 500 (S&P 500) Index, returned +4.68%, and its comparable Lipper category of Natural Resources Funds had an average return of +28.89%. (Funds in this Lipper category invest their equity assets primarily in natural resources stocks.) The Trust's outperformance of the S&P 500 Index resulted primarily from both stock selection and an overweight position in oil and gas producers, including EOG Resources, Inc., an oil and gas exploration and production company, and four Canadian energy companies: Suncor Energy, Inc., Talisman Energy, Inc., EnCana Corp. and Canadian Natural Resources Ltd. The Trust's investments in several oil service and drilling contractors also enhanced relative performance, most notably National Oilwell Varco, Inc., a supplier of equipment used on both offshore and onshore drilling rigs. In addition, the share prices of two deepwater drilling rig contractors, Transocean, Inc. and GlobalSantaFe Corp., appreciated as sharply rising drilling rates led to higher profit projections. Our holdings in two shallow-water drilling companies, TODCO and Hercules Offshore, Inc., also contributed positively to the Trust's relative performance for the period. In the metals and mining sector, the portfolio's relative results benefited from the strong performance of Aluminum Corp. of China Ltd. The portfolio's holdings in two gold mining companies, Glamis Gold Ltd. and Eldorado Gold Corp., performed well as their new mine developments progressed and as the price of gold reached a multi-year high. The Trust's continued underweight positions in the chemical and paper and forest products sectors proved beneficial to performance, although our holdings in Praxair, Inc., an industrial gas supplier, and Sappi Ltd., a coated paper manufacturer, had a modest positive effect on relative returns. On the negative side, new inflows into the Trust resulted in higher cash balances that detracted somewhat from relative results in an environment of generally rising equity prices. Nevertheless, this certainly was not enough to derail the Trust's positive absolute and relative performance. The Trust's outperformance of its comparable Lipper category of Natural Resources Funds is attributed primarily to our emphasis on stocks leveraged to rising oil and gas prices, as well as oil service companies that are benefiting from rising drilling day-rates. What changes were made to the portfolio during the period? Late in the period, we began to shift the portfolio's holdings into oil service and offshore drilling companies and de-emphasized oil and gas production companies, especially those leveraged to North American natural gas. While we continue to be bullish on the long-term fundamentals of the natural gas sector, an unseasonably warm start to the winter heating season and then a record warm January left North American natural gas storage levels at historically high levels. Consequently, natural gas prices fell sharply from the highs seen after Hurricanes Katrina and Rita damaged production facilities in the Gulf of Mexico. While some Gulf of Mexico production remains shut down, we believe the natural gas markets will be volatile through the summer months due to the high levels of gas remaining in storage. In addition, should the industry achieve full storage well before the start of the 2006-2007 heating season, natural gas prices could temporarily drop below $6 per thousand cubic feet. Given this potential price weakness, we believe the portfolio's holdings in gas-leveraged production companies will have a tough start to the year. Therefore, we shifted assets to more oil- leveraged companies, such as Occidental Petroleum Corp., and to offshore drilling companies where rigs are in a tight supply-and-demand balance. We added to our existing positions in Transocean, Inc., GlobalSantaFe Corp. and ENSCO International, Inc., and we initiated a new holding in Diamond Offshore Drilling, Inc., a deepwater oil drilling company. We continue to believe that earnings momentum will move significantly from the oil and gas producers into oil service stocks during 2006. Barring another year of record hurricane activity and high oil and gas prices, earnings comparisons for the oil and gas producers may be difficult in the latter half of 4 MERRILL LYNCH NATURAL RESOURCES TRUST JANUARY 31, 2006 2006. In addition, higher oil service and drilling costs most likely will have a negative effect on the oil producers' profit margins. However, given the strong long-term fundamentals for natural gas, potential geopolitical events that could result in rising oil prices, and the potential for increased merger-and-acquisition activity, we maintain a significant exposure to oil and natural gas producers. However, we anticipate a very challenging environment for this sector early in 2006. How would you characterize the Trust's position at the close of the period? The Trust remains highly focused on energy investments, still led by oil and gas producers, but with an increasing emphasis on oil service companies and those producers more weighted to oil production. In addition, the introduction of regulations for cleaner gasoline during the upcoming summer driving season should have positive implications for the refining industry. Under these circumstances, we anticipate increasing our holdings of independent refiners and major integrated companies leveraged to the refining sector. We continue to believe that oil prices should remain high as demand continues to rise to a level that is close to the limits of available world production capacity. Given the remaining damage from last summer's hurricanes, combined with declining oil production in Iraq due to maintenance and security issues, and disruptions from rioting in Nigeria, we believe that oil prices could be subject to price spikes should additional supply disruptions occur. As of January 31, 2006, roughly 91% of the Trust's total investments was invested in stocks and 9% in cash equivalents. Approximately 85% of the portfolio's net assets was in energy-related companies, with the remaining equity holdings in metals and mining, utilities, paper and forest products, and chemicals. Robert M. Shearer Vice President and Portfolio Manager February 28, 2006 MERRILL LYNCH NATURAL RESOURCES TRUST JANUARY 31, 2006 5 Performance Data About Fund Performance Investors are able to purchase shares of the Trust through multiple pricing alternatives: o Class A Shares incur a maximum initial sales charge (front-end load) of 5.25% and an account maintenance fee of 0.25% per year (but no distribution fee). o Class B Shares are subject to a maximum contingent deferred sales charge of 4% declining to 0% after six years. In addition, Class B Shares are subject to a distribution fee of 0.75% per year and an account maintenance fee of 0.25% per year. These shares automatically convert to Class A Shares after approximately eight years. (There is no initial sales charge for automatic share conversions.) All returns for periods greater than eight years reflect this conversion. o Class C Shares are subject to a distribution fee of 0.75% per year and an account maintenance fee of 0.25% per year. In addition, Class C Shares are subject to a 1% contingent deferred sales charge if redeemed within one year of purchase. o Effective December 28, 2005, Class I Shares are no longer subject to any front-end sales charge. Class I Shares bear no ongoing distribution or account maintenance fees and are available only to eligible investors. Had the sales charge been included, the Fund's Class I Shares' performance would have been lower. None of the past results shown should be considered a representation of future performance. Current performance may be lower or higher than the performance data quoted. Refer to www.mlim.ml.com to obtain performance data current to the most recent month-end. Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. Figures shown in each of the following tables assume reinvestment of all dividends and capital gain distributions, if any, at net asset value on the ex-dividend date. Investment return and principal value of shares will fluctuate so that shares, when redeemed, may be worth more or less than their original cost. Dividends paid to each class of shares will vary because of the different levels of account maintenance, distribution and transfer agency fees applicable to each class, which are deducted from the income available to be paid to shareholders. Recent Performance Results 6-Month 12-Month 10-Year As of January 31, 2006 Total Return Total Return Total Return ========================================================================================== ML Natural Resources Trust Class A Shares* +29.79% +67.26% +297.29% - ------------------------------------------------------------------------------------------ ML Natural Resources Trust Class B Shares* +29.29 +66.00 +273.07 - ------------------------------------------------------------------------------------------ ML Natural Resources Trust Class C Shares* +29.31 +66.02 +267.39 - ------------------------------------------------------------------------------------------ ML Natural Resources Trust Class I Shares* +29.98 +67.68 +307.43 - ------------------------------------------------------------------------------------------ S&P 500(R) Index** + 4.68 +10.38 +136.62 - ------------------------------------------------------------------------------------------ * Investment results shown do not reflect sales charges; results would be lower if a sales charge was included. Cumulative total investment returns are based on changes in net asset values for the periods shown, and assume reinvestment of all dividends and capital gains distributions at net asset value on the ex-dividend date. ** This unmanaged Index covers the 500 industrial, utility, transportation and financial companies of the U.S. markets (mostly NYSE issues), representing about 75% of NYSE market capitalization and 30% of NYSE issues. S&P 500 is a registered trademark of the McGraw-Hill Companies. 6 MERRILL LYNCH NATURAL RESOURCES TRUST JANUARY 31, 2006 Performance Data (concluded) Average Annual Total Return - -------------------------------------------------------------------------------- Return Without Return With Sales Charge Sales Charge** ================================================================================ Class A Shares* ================================================================================ One Year Ended 1/31/06 +67.26% +58.48% - -------------------------------------------------------------------------------- Five Years Ended 1/31/06 +23.34 +22.02 - -------------------------------------------------------------------------------- Ten Years Ended 1/31/06 +14.79 +14.17 - -------------------------------------------------------------------------------- * Maximum sales charge is 5.25%. ** Assuming maximum sales charge. - -------------------------------------------------------------------------------- Return Return Without CDSC With CDSC** ================================================================================ Class B Shares* ================================================================================ One Year Ended 1/31/06 +66.00% +62.00% - -------------------------------------------------------------------------------- Five Years Ended 1/31/06 +22.40 +22.22 - -------------------------------------------------------------------------------- Ten Years Ended 1/31/06 +14.07 +14.07 - -------------------------------------------------------------------------------- * Maximum contingent deferred sales charge is 4% and is reduced to 0% after six years. ** Assuming payment of applicable contingent deferred sales charge. - -------------------------------------------------------------------------------- Return Return Without CDSC With CDSC** ================================================================================ Class C Shares* ================================================================================ One Year Ended 1/31/06 +66.02% +65.02% - -------------------------------------------------------------------------------- Five Years Ended 1/31/06 +22.40 +22.40 - -------------------------------------------------------------------------------- Ten Years Ended 1/31/06 +13.90 +13.90 - -------------------------------------------------------------------------------- * Maximum contingent deferred sales charge is 1% and is reduced to 0% after one year. ** Assuming payment of applicable contingent deferred sales charge. - -------------------------------------------------------------------------------- Class I Shares Return ================================================================================ One Year Ended 1/31/06 +67.68% - -------------------------------------------------------------------------------- Five Years Ended 1/31/06 +23.66 - -------------------------------------------------------------------------------- Ten Years Ended 1/31/06 +15.08 - -------------------------------------------------------------------------------- MERRILL LYNCH NATURAL RESOURCES TRUST JANUARY 31, 2006 7 Disclosure of Expenses Shareholders of this Trust may incur the following charges: (a) expenses related to transactions, including sales charges, redemption fees and exchange fees; and (b) operating expenses including advisory fees, distribution fees including 12b-1 fees, and other Trust expenses. The following example (which is based on a hypothetical investment of $1,000 invested on August 1, 2005 and held through January 31, 2006) is intended to assist shareholders both in calculating expenses based on an investment in the Trust and in comparing these expenses with similar costs of investing in other mutual funds. The first table below provides information about actual account values and actual expenses. In order to estimate the expenses a shareholder paid during the period covered by this report, shareholders can divide their account value by $1,000 and then multiply the result by the number in the first line under the heading entitled "Expenses Paid During the Period." The second table below provides information about hypothetical account values and hypothetical expenses based on the Trust's actual expense ratio and an assumed rate of return of 5% per year before expenses. In order to assist shareholders in comparing the ongoing expenses of investing in this Trust and other funds, compare the 5% hypothetical example with the 5% hypothetical examples that appear in other funds' shareholder reports. The expenses shown in the table are intended to highlight shareholders' ongoing costs only and do not reflect any transactional expenses, such as sales charges, redemption fees or exchange fees. Therefore, the second table is useful in comparing ongoing expenses only, and will not help shareholders determine the relative total expenses of owning different funds. If these transactional expenses were included, shareholder expenses would have been higher. Expenses Paid Beginning Ending During the Period* Account Value Account Value August 1, 2005 to August 1, 2005 January 31, 2006 January 31, 2006 =========================================================================================================== Actual =========================================================================================================== Class A $1,000 $1,297.90 $ 6.21 - ----------------------------------------------------------------------------------------------------------- Class B $1,000 $1,292.90 $10.69 - ----------------------------------------------------------------------------------------------------------- Class C $1,000 $1,293.10 $10.69 - ----------------------------------------------------------------------------------------------------------- Class I $1,000 $1,299.80 $ 4.75 =========================================================================================================== Hypothetical (5% annual return before expenses)** =========================================================================================================== Class A $1,000 $1,020.10 $ 5.46 - ----------------------------------------------------------------------------------------------------------- Class B $1,000 $1,016.17 $ 9.40 - ----------------------------------------------------------------------------------------------------------- Class C $1,000 $1,016.17 $ 9.40 - ----------------------------------------------------------------------------------------------------------- Class I $1,000 $1,021.37 $ 4.17 - ----------------------------------------------------------------------------------------------------------- * For each class of the Trust, expenses are equal to the annualized expense ratio for the class (1.06% for Class A, 1.83% for Class B,1.83% for Class C and .81% for Class I), multiplied by the average account value over the period, multiplied by 186/365 (to reflect the one-half year period shown). ** Hypothetical 5% annual return before expenses is calculated by pro-rating the number of days in the most recent fiscal half year divided by 365. 8 MERRILL LYNCH NATURAL RESOURCES TRUST JANUARY 31, 2006 Schedule of Investments (in U.S. dollars) Shares Country Industry Common Stocks Held Value =============================================================================== Australia--1.0% Metals & Mining--1.0% Alumina Ltd. 153,800 $ 873,731 BHP Billiton Ltd. 60,500 1,180,747 Newcrest Mining Ltd. 120,000 2,378,287 ------------------------------------------------------------------- Total Common Stocks in Australia 4,432,765 =============================================================================== Brazil--0.5% Metals & Mining--0.5% Companhia Vale do Rio Doce (a) 43,500 2,230,245 ------------------------------------------------------------------- Total Common Stocks in Brazil 2,230,245 =============================================================================== Canada--24.0% Canadian Independents--19.8% Alberta Clipper Energy, Inc. (d) 74,288 231,967 Atlas Energy Ltd. (d) 254,000 1,188,577 Bear Ridge Resources Ltd. (d) 47,200 251,420 Canadian Natural Resources Ltd. 119,700 7,391,603 Chamaelo Exploration Ltd. (d) 165,100 1,111,930 Clear Energy, Inc. (d) 120,000 513,251 Compton Petroleum Corp. (d) 262,100 4,316,752 Crew Energy, Inc. (d) 249,700 3,712,849 Cyries Energy, Inc. (d) 88,928 1,190,062 Dual Exploration, Inc. (d) 54,750 107,747 Ember Resources, Inc. (d) 74,288 513,317 EnCana Corp. 359,822 17,860,490 Grand Petroleum, Inc. (d) 140,000 635,529 Husky Energy, Inc. 53,200 3,327,036 Kereco Energy Ltd. (d) 74,900 961,718 Mission Oil & Gas, Inc. (d) 236,661 1,809,164 Nexen, Inc. 59,300 3,381,755 Niko Resources Ltd. 21,800 1,014,588 Oilexco, Inc. (d) 82,000 272,544 Paramount Resources Ltd. (d) 75,000 2,358,305 Petro-Canada 126,000 6,007,400 ProEx Energy Ltd. (d) 92,653 1,197,771 Real Resources, Inc. (d) 90,100 2,179,801 Rider Resources Ltd. (d) 287,918 5,290,962 Suncor Energy, Inc. 101,300 8,067,318 TUSK Energy Corp. (d) 353,500 1,174,932 Talisman Energy, Inc. 157,600 9,552,768 Zenas Energy Corp. (d) 212,581 938,978 ------------ 86,560,534 ------------------------------------------------------------------- Gold--1.3% Barrick Gold Corp. 51,800 1,617,476 Eldorado Gold Corp. (d) 404,500 2,034,352 Glamis Gold Ltd. (d) 67,800 2,159,780 ------------ 5,811,608 ------------------------------------------------------------------- Metals & Mining--1.1% Alcan, Inc. 30,200 1,473,458 Northern Orion Resources, Inc. (d) 211,000 847,100 Teck Cominco Ltd. Class B 38,300 2,461,210 ------------ 4,781,768 ------------------------------------------------------------------- Oil & Gas Drilling--1.1% Ensign Resource Service Group, Inc. 52,300 2,196,207 Western Lakota Energy Services, Inc. (d) 138,800 2,330,937 ------------ 4,527,144 ------------------------------------------------------------------- Oil & Gas Equipment & Services--0.7% Calfrac Well Services Ltd. 26,200 1,004,184 Tesco Corp. (d) 106,300 2,192,385 ------------ 3,196,569 ------------------------------------------------------------------- Total Common Stocks in Canada 104,877,623 =============================================================================== China--1.2% Metals & Mining--1.2% Aluminum Corp. of China Ltd. (a) 54,200 5,018,920 ------------------------------------------------------------------- Total Common Stocks in China 5,018,920 =============================================================================== France--2.4% Integrated Oil & Gas--1.4% Total SA (a) 45,400 6,280,182 ------------------------------------------------------------------- Oil & Gas Equipment & Services--1.0% Technip SA (a) 64,975 4,429,346 ------------------------------------------------------------------- Total Common Stocks in France 10,709,528 =============================================================================== Hong Kong--0.6% Oil & Gas Exploration & Production--0.6% CNOOC Ltd. (a) 31,400 2,703,226 ------------------------------------------------------------------- Total Common Stocks in Hong Kong 2,703,226 =============================================================================== Italy--1.0% Integrated Oil & Gas--0.3% ENI SpA (a) 19,250 1,167,512 ------------------------------------------------------------------- Oil & Gas Drilling--0.7% Saipem SpA 164,500 3,279,533 ------------------------------------------------------------------- Total Common Stocks in Italy 4,447,045 =============================================================================== Norway--0.3% Oil & Gas Equipment & Services--0.3% Stolt Offshore, SA (a)(d) 85,000 1,080,350 ------------------------------------------------------------------- Total Common Stocks in Norway 1,080,350 =============================================================================== South Africa--0.4% Paper--0.4% Sappi Ltd. (a) 128,500 1,680,780 ------------------------------------------------------------------- Total Common Stocks in South Africa 1,680,780 =============================================================================== United Kingdom--0.3% Integrated Oil & Gas--0.3% BP Plc (a) 18,600 1,344,966 ------------------------------------------------------------------- Total Common Stocks in the United Kingdom 1,344,966 =============================================================================== United States--61.4% Chemicals--0.2% Praxair, Inc. 18,000 948,240 ------------------------------------------------------------------- Energy Equipment & Services--3.2% Dresser-Rand Group, Inc. (d) 138,800 3,737,884 Dril-Quip, Inc. (d) 28,000 1,763,160 Hanover Compressor Co. (d) 1,605 26,579 National Oilwell Varco, Inc. (d) 109,433 8,324,568 ------------ 13,852,191 ------------------------------------------------------------------- Integrated Oil & Gas--8.4% Alon USA Energy, Inc. (d) 30,200 651,716 Chevron Corp. 80,591 4,785,494 ConocoPhillips 93,958 6,079,083 MERRILL LYNCH NATURAL RESOURCES TRUST JANUARY 31, 2006 9 Schedule of Investments (continued) (in U.S. dollars) Shares Country Industry Common Stocks Held Value =============================================================================== United States (continued) Integrated Oil & Gas (concluded) Exxon Mobil Corp. 93,028 $ 5,837,507 Marathon Oil Corp. 39,500 3,036,365 Murphy Oil Corp. 247,400 14,101,800 Williams Cos., Inc. 100,500 2,395,920 ------------ 36,887,885 ------------------------------------------------------------------- Metals & Mining--3.4% Alcoa, Inc. 22,900 721,350 Arch Coal, Inc. 18,000 1,560,960 Consol Energy, Inc. 34,100 2,485,890 James River Coal Co. (d) 21,800 927,590 Newmont Mining Corp. 9,100 562,380 Peabody Energy Corp. 69,600 6,925,896 Southern Copper Corp. 22,900 1,994,590 ------------ 15,178,656 ------------------------------------------------------------------- Oil & Gas Drilling--12.5% Diamond Offshore Drilling, Inc. 21,800 1,850,166 ENSCO International, Inc. 107,300 5,485,176 GlobalSantaFe Corp. 145,022 8,853,593 Helmerich & Payne, Inc. 47,600 3,729,936 Hercules Offshore, Inc. (d) 115,000 4,118,150 Nabors Industries Ltd. (d)(e) 48,500 3,940,625 Noble Corp. (e) 70,900 5,703,196 Patterson-UTI Energy, Inc. 49,500 1,862,190 Pride International, Inc. (d) 70,700 2,496,417 Rowan Cos., Inc. 50,000 2,241,500 TODCO Class A 113,000 5,039,800 Transocean, Inc. (d)(e) 107,100 8,691,165 Union Drilling, Inc. (d) 50,000 873,000 ------------ 54,884,914 ------------------------------------------------------------------- Oil & Gas Equipment & Services--11.8% BJ Services Co. 201,600 8,162,784 Baker Hughes, Inc. 94,400 7,310,336 Cooper Cameron Corp. (d) 65,400 3,164,706 FMC Technologies, Inc. (d) 94,300 4,886,626 Grant Prideco, Inc. (d) 34,000 1,703,060 Halliburton Co. 64,700 5,146,885 Lone Star Technologies Inc. (d) 24,600 1,399,740 Oil States International, Inc. (d) 95,800 3,918,220 Schlumberger Ltd. 37,900 4,830,355 Smith International, Inc. 97,400 4,383,000 Superior Well Services, Inc. (d) 10,300 288,503 Weatherford International Ltd. (d)(e) 142,226 6,368,880 ------------ 51,563,095 ------------------------------------------------------------------- Oil & Gas Exploration & Production--17.9% Apache Corp. 126,760 9,574,183 Bill Barrett Corp. (d) 10,600 407,040 Burlington Resources, Inc. 81,394 7,428,016 Cabot Oil & Gas Corp. Class A 44,100 2,274,237 CanArgo Energy Corp. (d) 235,500 320,280 Carrizo Oil & Gas, Inc. (d) 59,100 1,705,626 Chesapeake Energy Corp. 69,400 2,431,776 Cimarex Energy Co. 21,094 961,043 Devon Energy Corp. 186,898 12,748,313 EOG Resources, Inc. 210,900 17,829,486 Energy Partners Ltd. (d) 87,000 2,442,090 Forest Oil Corp. (d) 45,800 2,358,700 Kerr-McGee Corp. 12,293 1,357,024 Newfield Exploration Co. (d) 69,000 3,615,600 Noble Energy, Inc. 63,800 2,952,664 Pioneer Natural Resources Co. 78,400 4,163,040 Range Resources Corp. 156,900 4,686,603 Southwestern Energy Co. (d) 31,000 1,337,340 ------------ 78,593,061 ------------------------------------------------------------------- Refining, Marketing & Transportation--2.8% Sunoco, Inc. 25,400 2,418,080 Valero Energy Corp. 121,000 7,554,030 Western Refining, Inc. (d) 114,100 2,139,375 ------------ 12,111,485 ------------------------------------------------------------------- Transportation--0.3% PHI, Inc. (d) 34,200 1,214,442 ------------------------------------------------------------------- Utilities--0.9% Equitable Resources, Inc. 102,000 3,763,800 ------------------------------------------------------------------- Total Common Stocks in the United States 268,997,769 ------------------------------------------------------------------- Total Common Stocks (Cost--$163,956,185)--93.1% 407,523,217 =============================================================================== =============================================================================== Short-Term Beneficial Securities Interest =============================================================================== Merrill Lynch Liquidity Series, LLC Cash Sweep Series I (b) $27,355,026 27,355,026 Merrill Lynch Liquidity Series, LLC Money Market Series (b)(c) 13,001,800 13,001,800 ------------------------------------------------------------------- Total Short-Term Securities (Cost--$40,356,826)--9.2% 40,356,826 =============================================================================== Total Investments (Cost--$204,313,011*)--102.3% 447,880,043 Liabilities in Excess of Other Assets--(2.3%) (9,998,565) ------------ Net Assets--100.0% $437,881,478 ============ 10 MERRILL LYNCH NATURAL RESOURCES TRUST JANUARY 31, 2006 Schedule of Investments (concluded) (in U.S. dollars) * The cost and unrealized appreciation (depreciation) of investments as of January 31, 2006, as computed for federal income tax purposes, were as follows: Aggregate cost ................................. $ 204,428,785 ============= Gross unrealized appreciation .................. $ 243,487,479 Gross unrealized depreciation .................. (36,221) ------------- Net unrealized appreciation .................... $ 243,451,258 ============= (a) Depositary Receipts. (b) Investments in companies considered to be an affiliate of the Trust, for purposes of Section 2(a)(3) of the Investment Company Act of 1940, were as follows: -------------------------------------------------------------------------- Net Interest Affiliate Activity Income -------------------------------------------------------------------------- Merrill Lynch Liquidity Series, LLC Cash Sweep Series I $9,103,180 $ 449,858 Merrill Lynch Liquidity Series, LLC Money Market Series $ 555,500 $ 8,684 -------------------------------------------------------------------------- (c) Security was purchased with the cash proceeds from securities loans. (d) Non-income producing security. (e) Security, or a portion of security, is on loan. o For Trust compliance purposes, the Trust's industry classifications refer to any one or more of the industry sub-classifications used by one or more widely recognized market indexes or ratings group indexes, and/or as defined by Trust management. This definition may not apply for purposes of this report, which may combine industry sub-classifications for reporting ease. Industries are shown as a percent of net assets. See Notes to Financial Statements. MERRILL LYNCH NATURAL RESOURCES TRUST JANUARY 31, 2006 11 Statement of Assets and Liabilities As of January 31, 2006 ==================================================================================================================================== Assets - ------------------------------------------------------------------------------------------------------------------------------------ Investments in unaffiliated securities, at value (including securities loaned of $12,617,834) (identified cost--$163,956,185) .............................. $407,523,217 Investments in affiliated securities, at value (identified cost--$40,356,826) ........ 40,356,826 Cash ................................................................................. 6,498 Receivables: Beneficial interest sold ........................................................... $ 3,569,408 Securities sold .................................................................... 500,208 Dividends .......................................................................... 58,824 Securities lending ................................................................. 775 4,129,215 ------------ Prepaid expenses and other assets .................................................... 32,401 ------------ Total assets ......................................................................... 452,048,157 ------------ ==================================================================================================================================== Liabilities - ------------------------------------------------------------------------------------------------------------------------------------ Collateral on securities loaned, at value ............................................ 13,001,800 Payables: Beneficial interest redeemed ....................................................... 722,823 Investment adviser ................................................................. 212,567 Distributor ........................................................................ 168,831 Other affiliates ................................................................... 60,658 1,164,879 ------------------------------- Total liabilities .................................................................... 14,166,679 ------------ ==================================================================================================================================== Net Assets - ------------------------------------------------------------------------------------------------------------------------------------ Net assets ........................................................................... $437,881,478 ============ ==================================================================================================================================== Net Assets Consist of - ------------------------------------------------------------------------------------------------------------------------------------ Class A Shares of beneficial interest, $.10 par value, unlimited number of shares authorized ................................................................ $ 354,484 Class B Shares of beneficial interest, $.10 par value, unlimited number of shares authorized ................................................................ 118,846 Class C Shares of beneficial interest, $.10 par value, unlimited number of shares authorized ................................................................ 173,508 Class I Shares of beneficial interest, $.10 par value, unlimited number of shares authorized ................................................................ 132,751 Paid-in capital in excess of par ..................................................... 190,229,361 Accumulated investment loss--net ..................................................... $ (759,877) Accumulated realized capital gains--net .............................................. 4,062,364 Unrealized appreciation--net ......................................................... 243,570,041 ------------ Total accumulated earnings--net ...................................................... 246,872,528 ------------ Net Assets ........................................................................... $437,881,478 ============ ==================================================================================================================================== Net Asset Value - ------------------------------------------------------------------------------------------------------------------------------------ Class A--Based on net assets of $202,603,521 and 3,544,843 shares of beneficial interest outstanding ..................................................... $ 57.15 ============ Class B--Based on net assets of $64,819,260 and 1,188,463 shares of beneficial interest outstanding ..................................................... $ 54.54 ============ Class C--Based on net assets of $93,427,253 and 1,735,076 shares of beneficial interest outstanding ..................................................... $ 53.85 ============ Class I--Based on net assets of $77,031,444 and 1,327,507 shares of beneficial interest outstanding ..................................................... $ 58.03 ============ See Notes to Financial Statements 12 MERRILL LYNCH NATURAL RESOURCES TRUST JANUARY 31, 2006 Statement of Operations For the Six Months Ended January 31, 2006 =================================================================================================================================== Investment Income - ----------------------------------------------------------------------------------------------------------------------------------- Dividends (net of $51,418 foreign withholding tax) ........................ $ 1,218,206 Interest from affiliates .................................................. 449,858 Securities lending--net ................................................... 8,684 ------------ Total income .............................................................. 1,676,748 ------------ =================================================================================================================================== Expenses - ----------------------------------------------------------------------------------------------------------------------------------- Investment advisory fees .................................................. $ 1,090,478 Account maintenance and distribution fees--Class C ........................ 366,895 Account maintenance and distribution fees--Class B ........................ 290,578 Account maintenance fees--Class A ......................................... 210,422 Transfer agent fees--Class A .............................................. 78,602 Accounting services ....................................................... 77,946 Transfer agent fees--Class C .............................................. 40,335 Transfer agent fees--Class B .............................................. 31,645 Transfer agent fees--Class I .............................................. 29,739 Registration fees ......................................................... 28,413 Professional fees ......................................................... 27,183 Trustees' fees and expenses ............................................... 25,410 Printing and shareholder reports .......................................... 24,114 Custodian fees ............................................................ 21,071 Pricing fees .............................................................. 2,309 Other ..................................................................... 12,196 ------------ Total expenses ............................................................ 2,357,336 ------------ Investment loss--net ...................................................... (680,588) ------------ =================================================================================================================================== Realized & Unrealized Gain (Loss)--Net - ----------------------------------------------------------------------------------------------------------------------------------- Realized gain on: Investments--net ........................................................ 6,587,218 Foreign currency transactions--net ...................................... 80,926 6,668,144 ------------ Change in unrealized appreciation/depreciation on: Investments--net ........................................................ 88,381,582 Foreign currency transactions--net ...................................... (79,666) 88,301,916 ------------------------------------- Total realized and unrealized gain ........................................ 94,970,060 ------------ Net Increase in Net Assets Resulting from Operations ...................... $ 94,289,472 ============ See Notes to Financial Statements. MERRILL LYNCH NATURAL RESOURCES TRUST JANUARY 31, 2006 13 Statements of Changes in Net Assets For the Six For the Months Ended Year Ended January 31, July 31, Increase (Decrease) in Net Assets: 2006 2005 =================================================================================================================================== Operations - ----------------------------------------------------------------------------------------------------------------------------------- Investment loss--net ............................................................. $ (680,588) $ (966,508) Realized gain--net ............................................................... 6,668,144 7,834,309 Change in unrealized appreciation/depreciation--net .............................. 88,301,916 90,243,170 ---------------------------------- Net increase in net assets resulting from operations ............................. 94,289,472 97,110,971 ---------------------------------- =================================================================================================================================== Distributions to Shareholders - ----------------------------------------------------------------------------------------------------------------------------------- Realized gain--net: Class A ........................................................................ (1,128,384) -- Class B ........................................................................ (386,717) -- Class C ........................................................................ (529,184) -- Class I ........................................................................ (415,609) -- ---------------------------------- Net decrease in net assets derived from distributions to shareholders ............ (2,459,894) -- ---------------------------------- =================================================================================================================================== Beneficial Interest Transactions - ----------------------------------------------------------------------------------------------------------------------------------- Net increase in net assets derived from beneficial interest transactions ......... 48,436,953 23,287,190 ---------------------------------- =================================================================================================================================== Net Assets - ----------------------------------------------------------------------------------------------------------------------------------- Total increase in net assets ..................................................... 140,266,531 120,398,161 Beginning of period .............................................................. 297,614,947 177,216,786 ---------------------------------- End of period* ................................................................... $ 437,881,478 $ 297,614,947 ================================== * Accumulated investment loss--net ............................................. $ (759,877) $ (79,289) ================================== See Notes to Financial Statements. 14 MERRILL LYNCH NATURAL RESOURCES TRUST JANUARY 31, 2006 Financial Highlights Class A ---------------------------------------------------------------------- For the Six Months Ended For the Year Ended July 31, The following per share data and ratios have been derived January 31, ----------------------------------------------------- from information provided in the financial statements. 2006 2005 2004 2003 2002 ================================================================================================================================== Per Share Operating Performance - ---------------------------------------------------------------------------------------------------------------------------------- Net asset value, beginning of period .............. $ 44.32 $ 28.89 $ 21.06 $ 18.22 $ 19.35 --------------------------------------------------------------------- Investment loss--net*** ........................... (.04) (.07) (.06) (.03) (.03) Realized and unrealized gain (loss)--net .......... 13.20 15.50 7.89 2.87 (1.10) --------------------------------------------------------------------- Total from investment operations .................. 13.16 15.43 7.83 2.84 (1.13) --------------------------------------------------------------------- Less distributions from realized gain--net ........ (.33) -- -- -- -- --------------------------------------------------------------------- Net asset value, end of period .................... $ 57.15 $ 44.32 $ 28.89 $ 21.06 $ 18.22 ===================================================================== ================================================================================================================================== Total Investment Return** - ---------------------------------------------------------------------------------------------------------------------------------- Based on net asset value per share ................ 29.79%+ 53.41% 37.18% 15.59% (5.84%) ===================================================================== ================================================================================================================================== Ratios to Average Net Assets - ---------------------------------------------------------------------------------------------------------------------------------- Expenses .......................................... 1.06%* 1.16% 1.25% 1.38% 1.45% ===================================================================== Investment loss--net .............................. (.14%)* (.20%) (.23%) (.17%) (.14%) ===================================================================== ================================================================================================================================== Supplemental Data - ---------------------------------------------------------------------------------------------------------------------------------- Net assets, end of period (in thousands) .......... $ 202,604 $ 136,740 $ 77,035 $ 56,094 $ 52,946 ===================================================================== Portfolio turnover ................................ 5.20% 11.14% 10.96% 18.26% 49.77% ===================================================================== * Annualized. ** Total investment returns exclude the effect of sales charges. *** Based on average shares outstanding. + Aggregate total investment return. See Notes to Financial Statements. MERRILL LYNCH NATURAL RESOURCES TRUST JANUARY 31, 2006 15 Financial Highlights (continued) Class B -------------------------------------------------------------------- For the Six Months Ended For the Year Ended July 31, The following per share data and ratios have been derived January 31, ---------------------------------------------------- from information provided in the financial statements. 2006 2005 2004 2003 2002 ================================================================================================================================== Per Share Operating Performance - ---------------------------------------------------------------------------------------------------------------------------------- Net asset value, beginning of period ................ $ 42.47 $ 27.90 $ 20.49 $ 17.87 $ 19.12 ------------------------------------------------------------------- Investment loss--net*** ............................. (.21) (.32) (.25) (.18) (.17) Realized and unrealized gain (loss)--net ............ 12.61 14.89 7.66 2.80 (1.08) ------------------------------------------------------------------- Total from investment operations .................... 12.40 14.57 7.41 2.62 (1.25) ------------------------------------------------------------------- Less distributions from realized gain--net .......... (.33) -- -- -- -- ------------------------------------------------------------------- Net asset value, end of period ...................... $ 54.54 $ 42.47 $ 27.90 $ 20.49 $ 17.87 =================================================================== ================================================================================================================================== Total Investment Return** - ---------------------------------------------------------------------------------------------------------------------------------- Based on net asset value per share .................. 29.29%+ 52.22% 36.16% 14.66% (6.54%) =================================================================== ================================================================================================================================== Ratios to Average Net Assets - ---------------------------------------------------------------------------------------------------------------------------------- Expenses ............................................ 1.83%* 1.93% 2.02% 2.16% 2.23% =================================================================== Investment loss--net ................................ (.89%)* (.97%) (1.00%) (.96%) (.91%) =================================================================== ================================================================================================================================== Supplemental Data - ---------------------------------------------------------------------------------------------------------------------------------- Net assets, end of period (in thousands) ............ $ 64,819 $ 52,595 $ 35,399 $ 23,829 $ 24,468 =================================================================== Portfolio turnover .................................. 5.20% 11.14% 10.96% 18.26% 49.77% =================================================================== * Annualized. ** Total investment returns exclude the effect of sales charges. *** Based on average shares outstanding. + Aggregate total investment return. See Notes to Financial Statements. 16 MERRILL LYNCH NATURAL RESOURCES TRUST JANUARY 31, 2006 Financial Highlights (continued) Class C ----------------------------------------------------------------------- For the Six Months Ended For the Year Ended July 31, The following per share data and ratios have been derived January 31, ------------------------------------------------------- from information provided in the financial statements. 2006 2005 2004 2003 2002 ---------------------------------------------------------------------- ================================================================================================================================== Per Share Operating Performance - ---------------------------------------------------------------------------------------------------------------------------------- Net asset value, beginning of period ............ $ 41.93 $ 27.55 $ 20.23 $ 17.65 $ 18.88 ---------------------------------------------------------------------- Investment loss--net*** ......................... (.22) (.32) (.25) (.18) (.17) Realized and unrealized gain (loss)--net ........ 12.47 14.70 7.57 2.76 (1.06) ---------------------------------------------------------------------- Total from investment operations ................ 12.25 14.38 7.32 2.58 (1.23) ---------------------------------------------------------------------- Less distributions from realized gain--net ...... (.33) -- -- -- -- ---------------------------------------------------------------------- Net asset value, end of period .................. $ 53.85 $ 41.93 $ 27.55 $ 20.23 $ 17.65 ====================================================================== ================================================================================================================================== Total Investment Return** - ---------------------------------------------------------------------------------------------------------------------------------- Based on net asset value per share .............. 29.31%+ 52.20% 36.18% 14.62% (6.51%) ====================================================================== ================================================================================================================================== Ratios to Average Net Assets - ---------------------------------------------------------------------------------------------------------------------------------- Expenses ........................................ 1.83%* 1.93% 2.02% 2.16% 2.24% ====================================================================== Investment loss--net ............................ (.92%)* (.97%) (1.01%) (.96%) (.93%) ====================================================================== ================================================================================================================================== Supplemental Data - ---------------------------------------------------------------------------------------------------------------------------------- Net assets, end of period (in thousands) ........ $ 93,427 $ 56,131 $ 29,695 $ 11,789 $ 8,129 ====================================================================== Portfolio turnover .............................. 5.20% 11.14% 10.96% 18.26% 49.77% ====================================================================== * Annualized. ** Total investment returns exclude the effect of sales charges. *** Based on average shares outstanding. + Aggregate total investment return. See Notes to Financial Statements. MERRILL LYNCH NATURAL RESOURCES TRUST JANUARY 31, 2006 17 Financial Highlights (concluded) Class I ---------------------------------------------------------------------- For the Six Months Ended For the Year Ended July 31, The following per share data and ratios have been derived January 31, ---------------------------------------------------- from information provided in the financial statements. 2006 2005 2004 2003 2002 ================================================================================================================================== Per Share Operating Performance - ---------------------------------------------------------------------------------------------------------------------------------- Net asset value, beginning of period ............. $ 44.93 $ 29.22 $ 21.25 $ 18.34 $ 19.42 --------------------------------------------------------------------- Investment income--net*** ........................ .03 .02 --+ .01 .02 Realized and unrealized gain (loss)--net ......... 13.40 15.69 7.97 2.90 (1.10) --------------------------------------------------------------------- Total from investment operations ................. 13.43 15.71 7.97 2.91 (1.08) --------------------------------------------------------------------- Less distributions from realized gain--net ....... (.33) -- -- -- -- --------------------------------------------------------------------- Net asset value, end of period ................... $ 58.03 $ 44.93 $ 29.22 $ 21.25 $ 18.34 ===================================================================== ================================================================================================================================== Total Investment Return** - ---------------------------------------------------------------------------------------------------------------------------------- Based on net asset value per share ............... 29.98%++ 53.76% 37.51% 15.87% (5.56%) ===================================================================== ================================================================================================================================== Ratios to Average Net Assets - ---------------------------------------------------------------------------------------------------------------------------------- Expenses ......................................... .81%* .91% 1.00% 1.12% 1.20% ===================================================================== Investment income--net ........................... .11%* .05% .02% .07% .12% ===================================================================== ================================================================================================================================== Supplemental Data - ---------------------------------------------------------------------------------------------------------------------------------- Net assets, end of period (in thousands) ......... $ 77,031 $ 52,148 $ 35,088 $ 23,981 $ 18,405 ===================================================================== Portfolio turnover ............................... 5.20% 11.14% 10.96% 18.26% 49.77% ===================================================================== * Annualized. ** Total investment returns exclude the effect of sales charges. Effective December 28, 2005, Class I Shares are no longer subject to any front-end sales charge. *** Based on average shares outstanding. + Amount is less than $.01 per share. ++ Aggregate total investment return. See Notes to Financial Statements. 18 MERRILL LYNCH NATURAL RESOURCES TRUST JANUARY 31, 2006 Notes to Financial Statements 1. Significant Accounting Policies: Merrill Lynch Natural Resources Trust (the "Trust") is registered under the Investment Company Act of 1940, as amended, as a non-diversified, open-end management investment company. The Trust's financial statements are prepared in conformity with U.S. generally accepted accounting principles, which may require the use of management accruals and estimates. Actual results may differ from these estimates. These unaudited financial statements reflect all adjustments, which are, in the opinion of management, necessary to present a fair statement of the results for the interim period. All such adjustments are of a normal, recurring nature. The Trust offers multiple classes of shares. Effective December 28, 2005, Class I Shares are no longer subject to any front-end sales charge. Class A Shares are sold with a front-end sales charge. Shares of Class B and Class C may be subject to a contingent deferred sales charge. Class I Shares are sold only to certain eligible investors. All classes of shares have identical voting, dividend, liquidation and other rights and the same terms and conditions, except that Class A, Class B and Class C Shares bear certain expenses related to the account maintenance of such shares, and Class B and Class C Shares also bear certain expenses related to the distribution of such shares. Each class has exclusive voting rights with respect to matters relating to its account maintenance and distribution expenditures (except that Class B shareholders may vote on certain changes to the Class A distribution plan). Income, expenses (other than expenses attributable to a specific class) and realized and unrealized gains and losses are allocated daily to each class based on its relative net assets. The following is a summary of significant accounting policies followed by the Trust. (a) Valuation of investments -- Equity securities that are held by the Trust that are traded on stock exchanges or the Nasdaq National Market are valued at the last sale price or official close price on the exchange, as of the close of business on the day the securities are being valued or, lacking any sales, at the last available bid price for long positions, and at the last available asked price for short positions. In cases where equity securities are traded on more than one exchange, the securities are valued on the exchange designated as the primary market by or under the authority of the Board of Trustees of the Trust. Long positions traded in the over-the-counter ("OTC") market, Nasdaq Small Cap or Bulletin Board are valued at the last available bid price or yield equivalent obtained from one or more dealers or pricing services approved by the Board of Trustees of the Trust. Short positions traded in the OTC market are valued at the last available asked price. Portfolio securities that are traded both in the OTC market and on a stock exchange are valued according to the broadest and most representative market. Options written are valued at the last sale price in the case of exchange-traded options or, in the case of options traded in the OTC market, the last asked price. Options purchased are valued at their last sale price in the case of exchange-traded options or, in the case of options traded in the OTC market, the last bid price. Swap agreements are valued based upon quoted fair valuations received daily by the Trust from a pricing service or counterparty. Financial futures contracts and options thereon, which are traded on exchanges, are valued at their last sale price as of the close of such exchanges. Obligations with remaining maturities of 60 days or less are valued at amortized cost unless the Investment Adviser believes that this method no longer produces fair valuations. Repurchase agreements are valued at cost plus accrued interest. The Trust employs pricing services to provide certain securities prices for the Trust. Securities and assets for which market quotations are not readily available are valued at fair value as determined in good faith by or under the direction of the Board of Trustees of the Trust, including valuations furnished by the pricing services retained by the Trust, which may use a matrix system for valuations. The procedures of a pricing service and its valuations are reviewed by the officers of the Trust under the general supervision of the Trust's Board of Trustees. Such valuations and procedures will be reviewed periodically by the Board of Trustees of the Trust. Generally, trading in foreign securities, as well as U.S. government securities, money market instruments and certain fixed income securities, is substantially completed each day at various times prior to the close of business on the New York Stock Exchange ("NYSE"). The values of such securities used in computing the net asset value of the Trust's shares are determined as of such times. Foreign currency exchange rates also are generally determined prior to the close of business on the NYSE. Occasionally, events affecting the values of such securities and such exchange rates may occur between the times at which they are determined and the close of business on the NYSE that may not be reflected in the computation of the Trust's net asset value. If events (for example, a company announcement, market volatility or a natural disaster) occur during such periods that are expected to materially affect the value of such securities, those securities may be valued at their fair value as determined in good faith by the Trust's Board of Trustees or by the Investment Adviser using a pricing service and/or procedures approved by the Trust's Board of Trustees. MERRILL LYNCH NATURAL RESOURCES TRUST JANUARY 31, 2006 19 Notes to Financial Statements (continued) (b) Derivative financial instruments -- The Trust may engage in various portfolio investment strategies both to increase the return of the Trust and to hedge, or protect, its exposure to interest rate movements and movements in the securities markets. Losses may arise due to changes in the value of the contract or if the counterparty does not perform under the contract. o Forward foreign exchange contracts -- The Trust may enter into forward foreign exchange contracts as a hedge against either specific transactions or portfolio positions. The contract is marked-to-market daily and the change in market value is recorded by the Trust as an unrealized gain or loss. When the contract is closed, the Trust records a realized gain or loss equal to the difference between the value at the time it was opened and the value at the time it was closed. o Options -- The Trust may purchase and write covered call options and put options. When the Trust writes an option, an amount equal to the premium received by the Trust is reflected as an asset and an equivalent liability. The amount of the liability is subsequently marked-to-market to reflect the current market value of the option written. When a security is purchased or sold through an exercise of an option, the related premium paid (or received) is added to (or deducted from) the basis of the security acquired or deducted from (or added to) the proceeds of the security sold. When an option expires (or the Trust enters into a closing transaction), the Trust realizes a gain or loss on the option to the extent of the premiums received or paid (or gain or loss to the extent the cost of the closing transaction is less than or greater than the premiums paid or received). Written and purchased options are non-income producing investments. (c) Foreign currency transactions -- Transactions denominated in foreign currencies are recorded at the exchange rate prevailing when recognized. Assets and liabilities denominated in foreign currencies are valued at the exchange rate at the end of the period. Foreign currency transactions are the result of settling (realized) or valuing (unrealized) assets or liabilities expressed in foreign currencies into U.S. dollars. Realized and unrealized gains or losses from investments include the effects of foreign exchange rates on investments. The Trust invests in foreign securities, which may involve a number of risk factors and special considerations not present with investments in securities of U.S. corporations. (d) Income taxes -- It is the Trust's policy to comply with the requirements of the Internal Revenue Code applicable to regulated investment companies and to distribute substantially all of its taxable income to its shareholders. Therefore, no federal income tax provision is required. Under the applicable foreign tax law, a withholding tax may be imposed on interest, dividends, and capital gains at various rates. (e) Security transactions and investment income -- Security transactions are recorded on the dates the transactions are entered into (the trade dates). Realized gains and losses on security transactions are determined on the identified cost basis. Dividend income is recorded on the ex-dividend dates. Dividends from foreign securities where the ex-dividend date may have passed are subsequently recorded when the Trust has determined the ex-dividend dates. Interest income is recognized on the accrual basis. (f) Prepaid registration fees -- Prepaid registration fees are charged to expense as the related shares are issued. (g) Dividends and distributions -- Dividends and distributions paid by the Trust are recorded on the ex-dividend dates. (h) Securities lending -- The Trust may lend securities to financial institutions that provide cash or securities issued or guaranteed by the U.S. government as collateral, which will be maintained at all times in an amount equal to at least 100% of the current market value of the loaned securities. The market value of the loaned securities is determined at the close of business of the Trust and any additional required collateral is delivered to the Trust on the next business day. Where the Trust receives securities as collateral for the loaned securities, it collects a fee from the borrower. The Trust typically receives the income on the loaned securities but does not receive the income on the collateral. Where the Trust receives cash collateral, it may invest such collateral and retain the amount earned on such investment, net of any amount rebated to the borrower. Loans of securities are terminable at any time and the borrower, after notice, is required to return borrowed securities within five business days. The Trust may pay reasonable finder's, lending agent, administrative and custodial fees in connection with its loans. In the event that the borrower defaults on its obligation to return borrowed securities because of insolvency or for any other reason, the Trust could experience delays and costs in gaining access to the collateral. The Trust also could suffer a loss where the value of the collateral falls below the market value of the borrowed securities, in the event of borrower default or in the event of losses on investments made with cash collateral. 20 MERRILL LYNCH NATURAL RESOURCES TRUST JANUARY 31, 2006 Notes to Financial Statements (continued) 2. Investment Advisory Agreement and Transactions with Affiliates: The Trust has entered into an Investment Advisory Agreement with Merrill Lynch Investment Managers, L.P. ("MLIM"). The general partner of MLIM is Princeton Services, Inc. ("PSI"), an indirect, wholly-owned subsidiary of Merrill Lynch & Co., Inc. ("ML & Co."), which is the limited partner of MLIM. The Trust has also entered into a Distribution Agreement and Distribution Plans with FAM Distributors, Inc. ("FAMD" or the "Distributor"), which is a wholly-owned subsidiary of Merrill Lynch Group, Inc. MLIM is responsible for the management of the Trust's portfolio and provides the necessary personnel, facilities, equipment and certain other services necessary to the operations of the Trust. For such services, the Trust pays a monthly fee of .60%, on an annual basis, of the average daily value of the Trust's net assets. MLIM has entered into a Sub-Advisory Agreement with Merrill Lynch Asset Management U.K. Limited ("MLAM U.K."), an affiliate of MLIM, pursuant to which MLAM U.K. provides investment advisory services to MLIM with respect to the Trust. There was no increase in the aggregate fees paid by the Trust for these services. Pursuant to the Distribution Plans adopted by the Trust in accordance with Rule 12b-1 under the Investment Company Act of 1940, the Trust pays the Distributor ongoing account maintenance and distribution fees. The fees are accrued daily and paid monthly at annual rates based upon the average daily net assets of the shares as follows: - -------------------------------------------------------------------------------- Account Distribution Maintenance Fee Fee - -------------------------------------------------------------------------------- Class A ................................ .25% -- Class B ................................ .25% .75% Class C ................................ .25% .75% - -------------------------------------------------------------------------------- Pursuant to a sub-agreement with the Distributor, Merrill Lynch, Pierce, Fenner & Smith Incorporated ("MLPF&S"), an affiliate of MLIM, also provides account maintenance and distribution services to the Trust. The ongoing account maintenance fee compensates the Distributor and MLPF&S for providing account maintenance services to Class A, Class B and Class C shareholders. The ongoing distribution fee compensates the Distributor and MLPF&S for providing shareholder and distribution-related services to Class B and Class C shareholders. For the six months ended January 31, 2006, FAMD earned underwriting discounts and MLPF&S earned dealer concessions on sales of the Trust's Class A and Class I Shares as follows: - -------------------------------------------------------------------------------- FAMD MLPF&S - -------------------------------------------------------------------------------- Class A ............................ $ 17,857 $238,139 Class I ............................ $ 174 $ 2,666 - -------------------------------------------------------------------------------- For the six months ended January 31, 2006, MLPF&S received contingent deferred sales charges of $60,945 and $17,007 relating to transactions in Class B and Class C Shares, respectively. The Trust has received an exemptive order from the Securities and Exchange Commission permitting it to lend portfolio securities to MLPF&S or its affiliates. Pursuant to that order, the Trust also has retained Merrill Lynch Investment Managers, LLC ("MLIM, LLC"), an affiliate of MLIM, as the securities lending agent for a fee based on a share of the returns on investment of cash collateral. MLIM, LLC may, on behalf of the Trust, invest cash collateral received by the Trust for such loans, among other things, in a private investment company managed by MLIM, LLC or in registered money market funds advised by MLIM or its affiliates. For the six months ended January 31, 2006, MLIM, LLC received $3,697 in securities lending agent fees. In addition, MLPF&S received $2,148 in commissions on the execution of portfolio security transactions for the Trust for the six months ended January 31, 2006. For the six months ended January 31, 2006, the Trust reimbursed MLIM $3,840 for certain accounting services. Financial Data Services, Inc. ("FDS"), a wholly-owned subsidiary of ML & Co., is the Trust's transfer agent. Certain officers and/or trustees of the Trust are officers and/or directors of MLIM, PSI, MLAM U.K., FDS, FAMD, ML & Co., and/or MLIM, LLC. In February 2006, ML & Co. and BlackRock, Inc. entered into an agreement to merge ML & Co.'s investment management business, including MLIM, with the investment management business of BlackRock, Inc. The transaction is expected to close in the third quarter of 2006. 3. Investments: Purchases and sales of investments, excluding short-term securities, for the six months ended January 31, 2006 were $50,692,926 and $17,476,683, respectively. MERRILL LYNCH NATURAL RESOURCES TRUST JANUARY 31, 2006 21 Notes to Financial Statements (concluded) 4. Beneficial Interest Transactions: Net increase in net assets derived from beneficial interest transactions was $48,436,953 and $23,287,190 for the six months ended January 31, 2006 and the year ended July 31, 2005, respectively. Transactions in shares of beneficial interest for each class were as follows: - ------------------------------------------------------------------------------- Class A Shares for the Six Months Dollar Ended January 31, 2006 Shares Amount - ------------------------------------------------------------------------------- Shares sold .............................. 899,269 $ 44,377,098 Automatic conversion of shares ........... 56,715 2,693,166 Shares issued to shareholders in reinvestment of distributions .......... 17,894 907,755 -------------------------------- Total issued ............................. 973,878 47,978,019 Shares redeemed .......................... (514,468) (25,087,342) -------------------------------- Net increase ............................. 459,410 $ 22,890,677 ================================ - ------------------------------------------------------------------------------- Class A Shares for the Year Dollar Ended July 31, 2005 Shares Amount - ------------------------------------------------------------------------------- Shares sold .............................. 925,625 $ 33,818,955 Automatic conversion of shares ........... 82,089 2,927,622 -------------------------------- Total issued ............................. 1,007,714 36,746,577 Shares redeemed .......................... (588,367) (20,666,239) -------------------------------- Net increase ............................. 419,347 $ 16,080,338 ================================ - ------------------------------------------------------------------------------- Class B Shares for the Six Months Dollar Ended January 31, 2006 Shares Amount - ------------------------------------------------------------------------------- Shares sold .............................. 250,597 $ 11,755,442 Shares issued to shareholders in reinvestment of distributions .......... 6,962 337,481 -------------------------------- Total issued ............................. 257,559 12,092,923 -------------------------------- Shares redeemed .......................... (248,277) (11,376,770) Automatic conversion of shares ........... (59,302) (2,693,166) -------------------------------- Total redeemed ........................... (307,579) (14,069,936) -------------------------------- Net decrease ............................. (50,020) $ (1,977,013) ================================ - ------------------------------------------------------------------------------- Class B Shares for the Year Dollar Ended July 31, 2005 Shares Amount - ------------------------------------------------------------------------------- Shares sold .............................. 448,297 $ 15,295,260 -------------------------------- Shares redeemed .......................... (393,176) (13,224,923) Automatic conversion of shares ........... (85,373) (2,927,622) -------------------------------- Total redeemed ........................... (478,549) (16,152,545) -------------------------------- Net decrease ............................. (30,252) $ (857,285) ================================ - ------------------------------------------------------------------------------- Class C Shares for the Six Months Dollar Ended January 31, 2006 Shares Amount - ------------------------------------------------------------------------------- Shares sold .............................. 603,521 $ 28,379,949 Shares issued to shareholders in reinvestment of distributions .......... 10,006 478,792 -------------------------------- Total issued ............................. 613,527 28,858,741 Shares redeemed .......................... (217,078) (9,982,926) -------------------------------- Net increase ............................. 396,449 $ 18,875,815 ================================ - ------------------------------------------------------------------------------- Class C Shares for the Year Dollar Ended July 31, 2005 Shares Amount - ------------------------------------------------------------------------------- Shares sold .............................. 675,082 $ 23,177,778 Shares redeemed .......................... (414,335) (14,289,502) -------------------------------- Net increase ............................. 260,747 $ 8,888,276 ================================ - ------------------------------------------------------------------------------- Class I Shares for the Six Months Dollar Ended January 31, 2006 Shares Amount - ------------------------------------------------------------------------------- Shares sold .............................. 376,223 $ 19,087,719 Shares issued to shareholders in reinvestment of distributions .......... 7,457 383,897 -------------------------------- Total issued ............................. 383,680 19,471,616 Shares redeemed .......................... (216,749) (10,824,142) -------------------------------- Net increase ............................. 166,931 $ 8,647,474 ================================ - ------------------------------------------------------------------------------- Class I Shares for the Year Dollar Ended July 31, 2005 Shares Amount - ------------------------------------------------------------------------------- Shares sold .............................. 367,722 $ 13,764,449 Shares redeemed .......................... (407,861) (14,588,588) -------------------------------- Net decrease ............................. (40,139) $ (824,139) ================================ 5. Short-Term Borrowings: The Trust, along with certain other funds managed by MLIM and its affiliates, is a party to a $500,000,000 credit agreement with a group of lenders. The Trust may borrow under the credit agreement to fund shareholder redemptions and for other lawful purposes other than for leverage. The Trust may borrow up to the maximum amount allowable under the Trust's current prospectus and statement of additional information, subject to various other legal, regulatory or contractual limits. The Trust pays a commitment fee of .07% per annum based on the Trust's pro rata share of the unused portion of the credit agreement. Amounts borrowed under the credit agreement bear interest at a rate equal to, at each Trust's election, the federal funds rate plus .50% or a base rate as defined in the credit agreement. The Trust did not borrow under the credit agreement during the six months ended January 31, 2006. On November 23, 2005 the credit agreement was renewed for one year under substantially the same terms. 6. Capital Loss Carryforward: On July 31, 2005, the Trust had a net capital loss carryforward of $36,268, all of which expires in 2011. This amount will be available to offset like amounts of any future taxable gains. 22 MERRILL LYNCH NATURAL RESOURCES TRUST JANUARY 31, 2006 Officers and Trustees Robert C. Doll, Jr., President and Trustee Donald W. Burton, Trustee Laurie Simon Hodrick, Trustee John Francis O'Brien, Trustee David H. Walsh, Trustee Fred G. Weiss, Trustee Donald C. Burke, Vice President and Treasurer Robert M. Shearer, Vice President and Portfolio Manager Jeffrey Hiller, Chief Compliance Officer Alice A. Pellegrino, Secretary Custodian The Bank of New York 100 Church Street New York, NY 10286 Transfer Agent Financial Data Services, Inc. 4800 Deer Lake Drive East Jacksonville, FL 32246-6484 800-637-3863 Availability of Quarterly Schedule of Investments The Trust files its complete schedule of portfolio holdings with the Securities and Exchange Commission ("SEC") for the first and third quarters of each fiscal year on Form N-Q. The Trust's Forms N-Q are available on the SEC's Web site at http://www.sec.gov. The Trust's Forms N-Q may also be reviewed and copied at the SEC's Public Reference Room in Washington, DC. Information on the operation of the Public Reference Room may be obtained by calling 1-800-SEC-0330. Electronic Delivery The Trust offers electronic delivery of communications to its shareholders. In order to receive this service, you must register your account and provide us with e-mail information. To sign up for this service, simply access this Web site at http://www.icsdelivery.com/live and follow the instructions. When you visit this site, you will obtain a personal identification number (PIN). You will need this PIN should you wish to update your e-mail address, choose to discontinue this service and/or make any other changes to the service. This service is not available for certain retirement accounts at this time. MERRILL LYNCH NATURAL RESOURCES TRUST JANUARY 31, 2006 23 [LOGO] Merrill Lynch Investment Managers www.mlim.ml.com - -------------------------------------------------------------------------------- Mercury Advisors A Division of Merrill Lynch Investment Managers www.mercury.ml.com This report is not authorized for use as an offer of sale or a solicitation of an offer to buy shares of the Trust unless accompanied or preceded by the Trust's current prospectus. Past performance results shown in this report should not be considered a representation of future performance. Investment return and principal value of shares will fluctuate so that shares, when redeemed, may be worth more or less than their original cost. Statements and other information herein are as dated and are subject to change. A description of the policies and procedures that the Trust uses to determine how to vote proxies relating to portfolio securities is available (1) without charge, upon request, by calling toll-free 1-800-637-3863; (2) at www.mutualfunds.ml.com; and (3) on the Securities and Exchange Commission's Web site at http://www.sec.gov. Information about how the Trust voted proxies relating to securities held in the Trust's portfolio during the most recent 12-month period ended June 30 is available (1) at www.mutualfunds.ml.com and (2) on the Securities and Exchange Commission's Web site at http://www.sec.gov. Merrill Lynch Natural Resources Trust Box 9011 Princeton, NJ 08543-9011 #10303 -- 1/06 Item 2 - Code of Ethics - Not Applicable to this semi-annual report Item 3 - Audit Committee Financial Expert - Not Applicable to this semi-annual report Item 4 - Principal Accountant Fees and Services - Not Applicable to this semi-annual report Item 5 - Audit Committee of Listed Registrants - Not Applicable Item 6 - Schedule of Investments - Not Applicable Item 7 - Disclosure of Proxy Voting Policies and Procedures for Closed-End Management Investment Companies - Not Applicable Item 8 - Portfolio Managers of Closed-End Management Investment Companies - Not Applicable Item 9 - Purchases of Equity Securities by Closed-End Management Investment Company and Affiliated Purchasers - Not Applicable Item 10 - Submission of Matters to a Vote of Security Holders - Not Applicable Item 11 - Controls and Procedures 11(a) - The registrant's certifying officers have reasonably designed such disclosure controls and procedures to ensure material information relating to the registrant is made known to us by others particularly during the period in which this report is being prepared. The registrant's certifying officers have determined that the registrant's disclosure controls and procedures are effective based on our evaluation of these controls and procedures as of a date within 90 days prior to the filing date of this report. 11(b) - There were no changes in the registrant's internal control over financial reporting (as defined in Rule 30a-3(d) under the Act (17 CFR 270.30a-3(d)) that occurred during the last fiscal half-year of the period covered by this report that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting. Item 12 - Exhibits attached hereto 12(a)(1) - Code of Ethics - Not Applicable to this semi-annual report 12(a)(2) - Certifications - Attached hereto 12(a)(3) - Not Applicable 12(b) - Certifications - Attached hereto Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. Merrill Lynch Natural Resources Trust By: /s/ Robert C. Doll, Jr. --------------------------------- Robert C. Doll, Jr., Chief Executive Officer of Merrill Lynch Natural Resources Trust Date: March 20, 2006 Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated. By: /s/ Robert C. Doll, Jr. --------------------------------- Robert C. Doll, Jr., Chief Executive Officer of Merrill Lynch Natural Resources Trust Date: March 20, 2006 By: /s/ Donald C. Burke --------------------------------- Donald C. Burke, Chief Financial Officer of Merrill Lynch Natural Resources Trust Date: March 20, 2006