BlackRock 20/80 Target Allocation Fund, Investor A (BACPX) N-CSRS Certified semi-annual shareholder report (management investment company)

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM N-CSR

CERTIFIED SHAREHOLDER REPORT OF REGISTERED

MANAGEMENT INVESTMENT COMPANIES

Investment Company Act file number 811-05742

Name of Fund: BlackRock Funds

Exchange Portfolio

Fund Address: 100 Bellevue Parkway, Wilmington, DE 19809

Name and address of agent for service: John M. Perlowski, Chief Executive Officer, BlackRock Funds, 55 East 52^nd Street, New York, NY 10055

Registrant’s telephone number, including area code: (800) 441-7762

Date of fiscal year end: 12/31/2011

Date of reporting period: 06/30/2011

Item 1 – Report to Stockholders

2

June 30, 2011

Semi-Annual Report (Unaudited)

BlackRock Exchange Portfolio | of BlackRock Funds^SM

Not FDIC Insured ¡ No Bank Guarantee ¡ May Lose Value

Table of Contents

	Page
Dear Shareholder		3
Semi-Annual Report:
Fund Summary		4
About Fund Performance		6
Disclosure of Expenses		6
Financial Statements:
Schedule of Investments		7
Statement of Assets and Liabilities		9
Statement of Operations		10
Statements of Changes in Net Assets		11
Financial Highlights		12
Notes to Financial Statements		13
Disclosure of Investment Advisory Agreement		17
Officers and Trustees		21
Additional Information		22
Mutual Fund Family		24

2 BLACKROCK EXCHANGE PORTFOLIO JUNE 30, 2011

Dear Shareholder

The recent downgrade of US long-term debt by Standard & Poor’s marked an historic event for financial markets. Stocks tumbled in the days before and after the announcement on August 5 as investors contemplated the pervasiveness of the lower US credit rating across asset classes and the future direction of the global economy. BlackRock was well prepared for the possibility of a downgrade and the firm had no need to execute any forced selling of securities in response to the S&P action. Through periods of uncertainty, as ever, BlackRock’s full resources are dedicated to the management of our clients’ assets.

The pages that follow reflect your mutual fund’s reporting period ended June 30, 2011. Accordingly, the below discussion is intended to provide you with perspective on the performance of your investments during that period.

Economic conditions in the second quarter of 2011 were strikingly similar to the scenario of the same quarter last year. The sovereign debt crisis in Europe, tightening monetary policy in China and a global economic slowdown were again the key concerns that drove investors away from risky assets. The second-quarter correction in 2010 was significant, but markets were revived toward the end of the summer as positive economic news and robust corporate earnings whetted investor appetite for yield. The global economy had finally gained traction and investor fear turned to optimism with the anticipation of a second round of quantitative easing (“QE2”) from the US Federal Reserve Board (the “Fed”). Stock markets rallied despite the ongoing European debt crisis and inflationary pressures looming over emerging markets. Fixed income markets, however, saw yields move sharply upward, pushing prices down, especially on the long end of the historically steep yield curve. While high yield bonds benefited from the risk rally, most fixed income sectors declined in the fourth quarter. The tax-exempt municipal market faced additional headwinds as it became evident that the Build America Bond program would not be extended and municipal finance troubles abounded.

The new year brought spikes of volatility as political turmoil swept across the Middle East/North Africa region and prices of oil and other commodities soared. Natural disasters in Japan disrupted industry supply chains and concerns mounted over US debt and deficit issues. Equities quickly rebounded from each of these events as investors chose to focus on the continuing stream of strong corporate earnings and positive economic data. Global credit markets were surprisingly resilient in this environment and yields regained relative stability in 2011. The tax-exempt market saw relief from its headwinds and steadily recovered from its fourth-quarter lows. Equities, commodities and high yield bonds outpaced higher-quality assets as investors responded to the Fed’s early 2011 reaffirmation that it will keep interest rates low.

However, longer-term headwinds had been brewing. Inflationary pressures intensified in emerging economies, many of which were overheating, and the European debt crisis was not over. Markets were met with a sharp reversal in May when political unrest in Greece pushed the nation closer to defaulting on its debt. This development rekindled fears about the broader debt crisis and its further contagion among peripheral European countries. Concurrently, it became evident that the pace of global economic growth had slowed. Higher oil prices and supply chain disruptions in Japan finally caught up with economic data. Investors pulled back from riskier assets and stocks generally declined throughout most of May and June, but year-to-date performance in global equity markets was positive, and 12-month returns were remarkably strong. In bond markets, yields were volatile but generally moved lower for the period as a whole (pushing prices up). Continued low short-term interest rates kept yields on money market securities near their all-time lows.

Sincerely,

Rob Kapito

President, BlackRock Advisors, LLC

“Markets generally moved higher despite heightened volatility during the reporting period.”

Rob Kapito

President, BlackRock Advisors, LLC

Total Returns as of June 30, 2011

	6-month			12-month
US large cap equities (S&P 500 Index)		6.02	%		30.69	%
US small cap equities (Russell 2000 Index)		6.21			37.41
International equities (MSCI Europe, Australasia, Far East Index)		4.98			30.36
Emerging market equities (MSCI Emerging Markets Index)		0.88			27.80
3-month Treasury bill (BofA Merrill Lynch 3-Month Treasury Bill Index)		0.08			0.16
US Treasury securities (BofA Merrill Lynch 10-Year US Treasury Index)		3.26			1.88
US investment grade bonds (Barclays Capital US Aggregate Bond Index)		2.72			3.90
Tax-exempt municipal bonds (Barclays Capital Municipal Bond Index)		4.42			3.48
US high yield bonds (Barclays Capital US Corporate High Yield 2% Issuer Capped Index)		4.98			15.53

Past performance is no guarantee of future results. Index performance shown for illustrative purposes only. You cannot invest directly in an index.

THIS PAGE NOT PART OF YOUR FUND REPORT 3

Fund Summary as of June 30, 2011

Investment Objective

BlackRock Exchange Portfolio’s (the “Fund”), one portfolio of BlackRock FundsSM (the “Trust”), investment objective is long-term growth of capital and consequent long-term growth of income.

Portfolio Management Commentary

How did the Fund perform?

• For the six-month period, the Fund underperformed its benchmark, the S&P 500^® Index.

What factors influenced performance?

• The Fund’s investment in Target Corp., its sole holding in the consumer discretionary sector, detracted significantly from the Fund’s performance. Disappointing sales growth trends at Target Corp. caused the stock to slide 21% during the period. The Fund’s positioning in the health care sector also had a negative impact as the Fund had no exposure to the health care providers and services industry, which gained 22% during the period, or the biotechnology industry, which gained 15%. Lastly, stock selection in consumer staples and energy detracted from returns. Within these sectors, Schlumberger Ltd. and The Procter & Gamble Co. had the most negative individual impact.

• Contributing positively to the Fund’s performance was stock selection in the financials sector, where a large holding of American Express Co. appreciated by more than 21% despite a challenging environment for financial companies. In the industrials sector, significant investments in both Caterpillar, Inc. and The Boeing Co. boosted returns as each of these stocks climbed 14% during the period. Both companies continued to show remarkably strong market positioning.

Describe recent portfolio activity.

• During the six-month period, we reduced the Fund’s holdings in Hewlett-Packard Co., which slightly lowered the Fund’s overall allocation to the information technology sector.

Describe portfolio positioning at period end.

• Relative to the S&P 500^® Index, the Fund ended the period with large overweights in the industrials and consumer staples sectors and significant underweights in consumer discretionary, utilities and materials.

The views expressed reflect the opinions of BlackRock as of the date of this report and are subject to change based on changes in market, economic or other conditions. These views are not intended to be a forecast of future events and are no guarantee of future results.

Portfolio Information

Ten Largest Holdings	Percent of Long-Term Investments
International Business Machines Corp.		7	%
Schlumberger Ltd.		7
American Express Co.		6
Berkshire Hathaway, Inc., Class B		6
Caterpillar, Inc.		6
Exxon Mobil Corp		5
Target Corp.		5
The Procter & Gamble Co.		5
Microsoft Corp		4
Novartis AG – ADR		4

Sector Allocation	Percent of Long-Term Investments
Information Technology		18	%
Financials		17
Industrials		16
Consumer Staples		15
Health Care		14
Energy		12
Consumer Discretionary		5
Telecommunication Services		2
Materials		1

For Fund compliance purposes, the Fund’s sector classifications refer to any one or more of the sector sub-classifications used by one or more widely recognized market indexes or ratings group indexes, and/or as defined by Fund management. These definitions may not apply for purposes of this report, which may combine sector sub-classifications for reporting ease.

4 BLACKROCK EXCHANGE PORTFOLIO JUNE 30, 2011

Total Return Based on a $10,000 Investment

¹  The Fund normally invests largely in a diversified and supervised portfolio of common stocks, or securities convertible into common stocks.

²  This unmanaged total return index covers 500 industrial, utility, transportation and financial companies of the US markets (mostly New York Stock Exchange (“NYSE”) issues) representing about 75% of NYSE market capitalization and 30% of NYSE issues. S&P 500^® is a trademark of The McGraw-Hill Companies, Inc.

Shares of the Fund are not currently offered to the public.

Performance Summary for the Period Ended June 30, 2011

	6-Month Total Returns			Average Annual Total  Returns3
				1 Year			5 Years			10 Years
BlackRock Shares		3.92	%		23.67	%		4.20	%		3.33	%
S&P 500® Index		6.02			30.69			2.94			2.72

³  See “About Fund Performance” on page 6 for a detailed description of performance related information.

Past performance is not indicative of future results.

Expense Example

	Actual						Hypothetical5						Annualized Expense Ratio
	Beginning Account Value January 1, 2011		Ending Account Value June  30, 2011		Expenses Paid During the Period4		Beginning Account Value January 1, 2011		Ending Account Value June  30, 2011		Expenses Paid During the Period4
BlackRock Shares	$	1,000.00	$	1,039.20	$	3.31	$	1,000.00	$	1,021.72	$	3.11		0.62	%

⁴  For the BlackRock Shares of the Fund, expenses are equal to the annualized expense ratio multiplied by the average account value over the period, multiplied by 181/365 (to reflect the one-half year period shown).

⁵  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.

See “Disclosure of Expenses” on page 6 for further information on how expenses were calculated.

BLACKROCK EXCHANGE PORTFOLIO JUNE 30, 2011 5

About Fund Performance

• BlackRock Shares are not subject to any sales charge. These shares bear no ongoing distribution or service fees and are available only to eligible investors.

Performance information reflects past performance and does not guarantee future results. Current performance may be lower or higher than the performance data quoted. Refer to www.blackrock.com/funds 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 the performance table on the previous page assume reinvestment of all dividends and distributions, if any, at net asset value on the payable 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.

The Fund’s investment advisor waived and/or reimbursed a portion of the Fund’s expenses. Without such waiver and/or reimbursement, the Fund’s performance would have been lower. BlackRock Advisors, LLC is under no obligation to waive or reimburse or to continue waiving or reimbursing its fees after May  1, 2012.

Disclosure of Expenses

Shareholders of the Fund may incur the following charges: (a) expenses related to transactions; and (b) operating expenses, including investment advisory fees and other Fund expenses. The expense example on the previous page (which is based on a hypothetical investment of $1,000 invested on January 1, 2011 and held through June 30, 2011) is intended to assist shareholders both in calculating expenses based on an investment in the Fund and in comparing these expenses with similar costs of investing in other mutual funds.

The table 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 under the heading entitled “Expenses Paid During the Period.”

The table also provides information about hypothetical account values and hypothetical expenses based on the Fund’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 the Fund 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, if any. Therefore, the hypothetical example 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.

6 BLACKROCK EXCHANGE PORTFOLIO JUNE 30, 2011

Schedule of Investments June 30, 2011 (Unaudited)
	(Percentages shown are based on Net Assets)

Common Stocks	Shares		Value
Aerospace & Defense – 7.2%
The Boeing Co.		126,232	$	9,332,332
General Dynamics Corp.		93,000		6,930,360
				16,262,692
Beverages – 2.6%
The Coca-Cola Co.		87,735		5,903,688
Capital Markets – 1.6%
Ameriprise Financial, Inc.		61,125		3,525,690
Computers & Peripherals – 3.9%
Hewlett-Packard Co.		238,564		8,683,730
Consumer Finance – 6.2%
American Express Co.		271,045		14,013,027
Diversified Financial Services – 2.3%
JPMorgan Chase & Co.		124,728		5,106,364
Diversified Telecommunication Services – 1.1%
Verizon Communications, Inc.		64,800		2,412,504
Energy Equipment & Services – 6.5%
Schlumberger Ltd.		168,194		14,531,962
Food & Staples Retailing – 2.8%
Wal-Mart Stores, Inc.		119,846		6,368,616
Food Products – 1.1%
General Mills, Inc.		16,994		632,517
Kraft Foods, Inc., Class A		53,285		1,877,231
				2,509,748
Health Care Equipment & Supplies – 0.4%
Medtronic, Inc.		22,800		878,484
Household Products – 4.6%
The Procter & Gamble Co.		162,456		10,327,328
Industrial Conglomerates – 2.7%
General Electric Co.		317,848		5,994,613
Insurance – 6.2%
Berkshire Hathaway, Inc., Class B(a)		180,100		13,937,939
IT Services – 9.2%
International Business Machines Corp.		90,052		15,448,421
The Western Union Co.		266,480		5,337,594
				20,786,015
Life Sciences Tools & Services – 0.7%
Agilent Technologies, Inc.(a)		29,749		1,520,471
Machinery – 5.6%
Caterpillar, Inc.		119,415		12,712,921
Metals & Mining – 1.3%
Freeport-McMoRan Copper & Gold, Inc.		53,600		2,835,440
Multiline Retail – 5.1%
Target Corp.		242,683		11,384,259
Oil, Gas & Consumable Fuels – 5.9%
BP Plc – ADR		31,546		1,397,172
Exxon Mobil Corp.		144,677		11,773,814
				13,170,986
Pharmaceuticals – 12.3%
AstraZeneca Plc – ADR		64,000		3,204,480
Johnson & Johnson		115,747		7,699,490
Merck & Co., Inc.		83,999		2,964,325
Novartis AG – ADR		155,916		9,528,027
Pfizer, Inc.		204,166		4,205,820
				27,602,142
Semiconductors & Semiconductor Equipment – 0.4%
Intel Corp.		40,915		906,676
Software – 4.2%
Microsoft Corp.		367,277		9,549,202
Tobacco – 3.2%
Altria Group, Inc.		77,000		2,033,570
Philip Morris International, Inc.		77,000		5,141,290
				7,174,860
Wireless Telecommunication Services – 0.8%
Vodafone Group Plc – ADR		64,452		1,722,157
Total Long-Term Investments (Cost – $44,746,944) – 97.9%				219,821,514
Short-Term Securities
BlackRock Liquidity Funds, TempFund,
Institutional Class, 0.08%(b)(c)		4,394,902		4,394,902
Total Short-Term Securities (Cost – $4,394,902) – 2.0%				4,394,902
Total Investments (Cost – $49,141,846*) – 99.9%				224,216,416
Other Assets in Excess of Liabilities – 0.1%				295,501
Net Assets – 100.0%			$	224,511,917

* The cost and unrealized appreciation (depreciation) of investments as of June 30, 2011, as computed for federal income tax purposes, were as follows:

Aggregate cost	$	46,824,909
Gross unrealized appreciation	$	177,758,228
Gross unrealized depreciation		(366,721	)
Net unrealized appreciation	$	177,391,507

(a) Non-income producing security.

Portfolio Abbreviation

ADR American Depositary Receipts

See Notes to Financial Statements.

BLACKROCK EXCHANGE PORTFOLIO JUNE 30, 2011 7

Schedule of Investments (concluded)

(b) Investments in companies considered to be an affiliate of the Fund during the period, for purposes of Section 2(a)(3) of the Investment Company Act of 1940, as amended, were as follows:

Affiliate	Shares/Beneficial Interest Held at December 31, 2010		Net Activity			Shares/Beneficial Interest Held at June 30, 2011		Income
BlackRock Liquidity Funds, TempFund, Institutional Class		4,828,864		(433,962	)		4,394,902	$	2,898
BlackRock Liquidity Series LLC, Money Market Series	$	7,122,500	$	(7,122,500	)		–	$	4,502

(c) Represents the current yield as of report date.

• For Fund compliance purposes, the Fund’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 Fund management. These definitions may not apply for purposes of this report, which may combine industry sub-classifications for reporting ease.

• Fair Value Measurements – Various inputs are used in determining the fair value of investments. These inputs are categorized in three broad levels for financial statement purposes as follows:

• Level 1 – price quotations in active markets/exchanges for identical assets and liabilities

• Level 2 – other observable inputs (including, but not limited to: quoted prices for similar assets or liabilities in markets that are active, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the assets or liabilities (such as interest rates, yield curves, volatilities, prepayment speeds, loss severities, credit risks and default rates) or other market–corroborated inputs)

• Level 3 – unobservable inputs based on the best information available in the circumstances, to the extent observable inputs are not available (including the Fund’s own assumptions used in determining the fair value of investments)

The categorization of a value determined for investments is based on the pricing transparency of the investment and does not necessarily correspond to the Fund’s perceived risk of investing in those securities. For information about the Fund’s policy regarding valuation of investments and other significant accounting policies, please refer to Note 1 of the Notes to Financial Statements.

The following table summarizes the inputs used as of June 30, 2011 in determining the fair valuation of the Fund’s investments:

Valuation Inputs	Level 1		Level 2		Level 3		Total
Assets:
Investments:
Long-Term Investments1	$	219,821,514		–		–	$	219,821,514
Short-Term Securities		4,394,902		–		–		4,394,902
Total	$	224,216,416		–		–	$	224,216,416

¹  See above Schedule of Investments for values in each industry.

See Notes to Financial Statements.

8 BLACKROCK EXCHANGE PORTFOLIO JUNE 30, 2011

Statement of Assets and Liabilities

June 30, 2011 (Unaudited)
Assets
Investments at value – unaffiliated (cost – $44,746,944)	$	219,821,514
Investments at value – affiliated (cost – $4,394,902)		4,394,902
Dividends receivable		442,020
Securities lending income receivable – affiliated		2,589
Receivable from advisor		436
Prepaid expenses		6,445
Total assets		224,667,906
Liabilities
Investment advisory fees payable		87,564
Professional fees payable		30,734
Other affiliates payable		8,818
Printing fees payable		7,161
Capital shares redeemed payable		5,000
Foreign taxes payable		1,289
Officer’s and Trustees’ fees payable		1,143
Other accrued expenses payable		14,280
Total liabilities		155,989
Net Assets	$	224,511,917
Net Assets Consist of
Paid-in capital	$	47,745,648
Undistributed net investment income		1,711,625
Accumulated net realized loss		(19,926	)
Net unrealized appreciation/depreciation		175,074,570
Net Assets	$	224,511,917
Net Asset Value
BlackRock Shares outstanding, unlimited number of shares authorized, $0.001 per value		357,107
Net asset value	$	628.70

See Notes to Financial Statements.

BLACKROCK EXCHANGE PORTFOLIO JUNE 30, 2011 9

Statement of Operations

Six Months Ended June 30, 2011 (Unaudited)
Investment Income
Dividends and reclaims	$	2,832,053
Foreign taxes withheld		(57,108	)
Securities lending – affiliated		5,936
Dividends – affiliated		2,898
Total income		2,783,779
Expenses
Investment advisory		557,117
Administration		111,425
Professional		31,738
Printing		13,856
Custodian		8,511
Officer and Trustees		3,951
Transfer agent		3,384
Miscellaneous		6,879
Total expenses		736,861
Less fees waived by advisor		(14,796	)
Less administration fees waived		(27,857	)
Less transfer agent fees waived		(611	)
Less transfer agent fees reimbursed		(2,773	)
Total expenses after fees waived and reimbursed		690,824
Net investment income		2,092,955
Realized and Unrealized Gain
Net realized gain from:
Investments		2,675
Redemption-in-kind transactions		173,634
		176,309
Net change in unrealized appreciation/depreciation on investments		6,340,270
Total realized and unrealized gain		6,516,579
Net Increase in Net Assets Resulting from Operations	$	8,609,534

See Notes to Financial Statements.

10 BLACKROCK EXCHANGE PORTFOLIO JUNE 30, 2011

Statements of Changes in Net Assets

Increase (Decrease) in Net Assets:	Six Months Ended June 30, 2011 (Unaudited)			Year Ended December 31, 2010
Operations
Net investment income	$	2,092,955		$	3,161,827
Net realized gain from investment transactions		2,675			7,566,871
Net realized gain from redemption-in-kind transactions		173,634			1,490,610
Net change in unrealized appreciation/depreciation		6,340,270			11,652,206
Net increase in net assets resulting from operations		8,609,534			23,871,514
Dividends to Shareholders From
Net investment income from BlackRock Shares		(447,960	)		(3,095,197	)
Capital Share Transactions
Shares issued in reinvestment of dividends		81,531			544,023
Shares redeemed		(2,378,974	)		(5,202,067	)
Net decrease in net assets derived from capital share transactions		(2,297,443	)		(4,658,044	)
Net Assets
Total increase in net assets		5,864,131			16,118,273
Beginning of period		218,647,786			202,529,513
End of period	$	224,511,917		$	218,647,786
Undistributed net investment income	$	1,711,625		$	66,630

See Notes to Financial Statements.

BLACKROCK EXCHANGE PORTFOLIO JUNE 30, 2011 11

Financial Highlights

	BlackRock Shares
	Six Months Ended June 30, 2011 (Unaudited)			Year Ended December 31,						Period October 1, 2008 to December 31, 2008			Year Ended September 30,
				2010			2009						2008			2007			2006
Per Share Operating Performance
Net asset value, beginning of period	$	606.04		$	548.49		$	443.11		$	572.26		$	676.66		$	575.50		$	533.63
Net investment income1		5.83			8.67			9.12			2.24			8.07			6.21			6.63
Net realized and unrealized gain (loss)		18.08			57.43			105.72			(124.70	)		(105.98	)		100.52			41.58
Net increase (decrease) from investment operations		23.91			66.10			114.84			(122.46	)		(97.91	)		106.73			48.21
Dividends from net investment income		(1.25	)		(8.55	)		(9.46	)		(6.69	)		(6.49	)		(5.57	)		(6.34	)
Net asset value, end of period	$	628.70		$	606.04		$	548.49		$	443.11		$	572.26		$	676.66		$	575.50
Total Investment Return2
Based on net asset value		3.92	%3		12.12	%		26.10	%		(21.35	)%3		(14.56	)%		18.62	%		9.06	%
Ratios to Average Net Assets
Total expenses		0.66	%4		0.67	%		0.68	%		0.71	%4		0.65	%		0.65	%		0.67	%
Total expenses after fees waived, reimbursed and paid indirectly		0.62	%4		0.62	%		0.61	%		0.60	%4		0.60	%		0.60	%		0.60	%
Net investment income		1.88	%4		1.54	%		1.96	%		1.94	%4		1.28	%		0.99	%		1.20	%
Supplemental Data
Net assets, end of period (000)	$	224,512		$	218,648		$	202,530		$	175,546		$	238,201		$	313,012		$	293,551
Portfolio turnover		–			2	%		–			–			–			1	%		–

¹  Based on average shares outstanding.

²  Where applicable, total investment returns include the reinvestment of dividends and distributions.

³  Aggregate total investment return.

⁴  Annualized.

See Notes to Financial Statements.

12 BLACKROCK EXCHANGE PORTFOLIO JUNE 30, 2011

Notes to Financial Statements (Unaudited)

1. Organization and Significant Accounting Policies:

BlackRock Funds^SM (the “Trust”) is registered under the Investment Company Act of 1940, as amended (the “1940 Act”), as an open-end management investment company. The Trust is organized as a Massachusetts business trust. As of June 30, 2011, the Trust had 25 series. These financial statements relate to one series of the Trust, BlackRock Exchange Portfolio (the “Fund”). The Fund is classified as diversified. The Fund’s financial statements are prepared in conformity with accounting principles generally accepted in the United States of America (“US GAAP”), which may require management to make estimates and assumptions that affect the reported amounts and disclosures in the financial statements. Actual results could differ from those estimates.

The following is a summary of significant accounting policies followed by the Fund:

Valuation: US GAAP defines fair value as the price the Fund would receive to sell an asset or pay to transfer a liability in an orderly transaction between market participants at the measurement date. The Fund fair values its financial instruments at market value using independent dealers or pricing services under policies approved by the Board of Trustees (the “Board”). Equity investments traded on a recognized securities exchange or the NASDAQ Global Market System (“NASDAQ”) are valued at the last reported sale price that day or the NASDAQ official closing price, if applicable. For equity investments traded on more than one exchange, the last reported sale price on the exchange where the stock is primarily traded is used. Equity investments traded on a recognized exchange for which there were no sales on that day are valued at the last available bid price. If no bid price is available, the prior day’s price will be used, unless it is determined that such prior day’s price no longer reflects the fair value of the security. Short-term securities with remaining maturities of 60 days or less may be valued at amortized cost, which approximates fair value. Investments in open-end registered investment companies are valued at net asset value each business day.

The Fund values its investment in BlackRock Liquidity Series, LLC Money Market Series (the “Money Market Series”) at fair value, which is ordinarily based upon its pro rata ownership in the underlying fund’s net assets. The Money Market Series seeks current income consistent with maintaining liquidity and preserving capital. Although the Money Market Series is not registered under the 1940 Act, its investments will follow the parameters of investments by a money market fund that is subject to Rule 2a-7 promulgated by the Securities and Exchange Commission (“SEC”) under the 1940 Act. The Fund may withdraw up to 25% of its investment daily, although the manager of the Money Market Series, in its sole discretion, may permit an investor to withdraw more than 25% on any one day.

In the event that application of these methods of valuation results in a price for an investment which is deemed not to be representative of the market value of such investment or is not available, the investment will be valued in accordance with a policy approved by the Board as reflecting fair value (“Fair Value Assets”). When determining the price for Fair Value Assets, the investment advisor seeks to determine the price that the Fund might reasonably expect to receive from the current sale of that asset in an arm’s-length transaction. Fair value determinations shall be based upon all available factors that the investment advisor deems relevant. The pricing of all Fair Value Assets is subsequently reported to the Board or a committee thereof.

Redemptions-In-Kind: The Fund transferred securities and cash to shareholders in connection with a redemption-in-kind transaction. For purposes of US GAAP, these transactions were treated as a sale of securities and the resulting gains and losses were recognized based on the market value of the securities on the date of the transfer. For tax purposes, no gains or losses were recognized. Gains and losses resulting from such redemptions-in-kind are shown as redemption-in-kind transactions in the Statement of Operations.

Investment Transactions and Investment Income: For financial reporting purposes, investment transactions are recorded on the dates the transactions are entered into (the trade dates). Realized gains and losses on investment 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 Fund is informed of the ex-dividend date. Under the applicable foreign tax laws, a withholding tax at various rates may be imposed on capital gains, dividends and interest.

Dividends and Distributions: Dividends and distributions paid by the Fund are recorded on the ex-dividend dates. The amount and timing of dividends and distributions are determined in accordance with federal income tax regulations, which may differ from US GAAP.

Securities Lending: The Fund may lend securities to approved borrowers, such as banks, brokers and other financial institutions. The borrower pledges cash, securities issued or guaranteed by the US government or irrevocable letters of credit issued by a bank 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 Fund and any additional required collateral is delivered to the Fund on the next business day. Securities lending income, as disclosed in the Statement of Operations, represents the income earned from the investment of the cash collateral, net of rebates paid to, or fees paid by, borrowers and less the fees paid to the securities lending agent. During the term of the loan, the Fund earns dividends on the securities loaned but does not receive dividend or interest income on the securities received as collateral. Loans of securities are terminable at any time and the borrower, after notice, is required to return borrowed securities within the standard time period for settlement of securities transactions. In the event that the borrower defaults on its obligation to return borrowed securities because of insolvency or for any other reason, the Fund could experience delays and costs in gaining access to the collateral. The Fund also could suffer a loss if the value of an investment purchased with cash collateral falls below the market value of loaned securities or if the value of an

BLACKROCK EXCHANGE PORTFOLIO JUNE 30, 2011 13

Notes to Financial Statements (continued)

investment purchased with cash collateral falls below the value of the original cash collateral received. During the period, the participating Fund accepted only cash collateral in connection with securities loaned.

Income Taxes: It is the Fund’s policy to comply with the requirements of the Internal Revenue Code of 1986, as amended, 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.

The Fund files US federal and various state and local tax returns. No income tax returns are currently under examination. The statute of limitations on the Fund’s US federal tax returns remains open for each of the four periods ended December 31, 2010. The statutes of limitations on the Fund’s state and local tax returns may remain open for an additional year depending upon the jurisdiction. Management does not believe there are any uncertain tax positions that require recognition of a tax liability.

Recent Accounting Standard: In May 2011, the Financial Accounting Standards Board issued amended guidance to improve disclosure about fair value measurements which will require the following disclosures for fair value measurements categorized as Level 3: quantitative information about the unobservable inputs and assumptions used in the fair value measurement, a description of the valuation policies and procedures and a narrative description of the sensitivity of the fair value measurement to changes in unobservable inputs and the interrelationships between those unobservable inputs. In addition, the amounts and reasons for all transfers in and out of Level 1 and Level 2 will be required to be disclosed. The amended guidance is effective for financial statements for fiscal years beginning after December 15, 2011, and interim periods within those fiscal years. Management is evaluating the impact of this guidance on the Fund’s financial statements and disclosures.

Other: Expenses directly related to the Fund are charged to the Fund. Other operating expenses shared by several funds are pro rated among those funds on the basis of relative net assets or other appropriate methods.

The Fund has an arrangement with the custodian whereby fees may be reduced by credits earned on uninvested cash balances, which, if applicable, are shown as fees paid indirectly in the Statement of Operations. The custodian imposes fees on overdrawn cash balances, which can be offset by accumulated credits earned or may result in additional custody charges.

2. Investment Advisory Agreement and Other Transactions with Affiliates:

The PNC Financial Services Group, Inc. (“PNC”) and Barclays Bank PLC (“Barclays”) are the largest stockholders of BlackRock, Inc. (“BlackRock”). Due to the ownership structure, PNC is an affiliate of the Trust for 1940 Act purposes, but Barclays is not.

The Trust, on behalf of the Fund entered into an Investment Advisory Agreement with BlackRock Advisors, LLC (the “Manager”), the Fund’s investment advisor, an indirect, wholly owned subsidiary of BlackRock, to provide investment advisory and administration services. The Manager is responsible for the management of the Fund’s portfolio and provides the necessary personnel, facilities, equipment and certain other services necessary to the operations of the Fund. For such services, the Fund paid the Manager a monthly fee based on the average daily value of the Fund’s net assets, at the annual rate of 0.50% from January 1, 2011 through May 31, 2011.

Effective June 1, 2011, the Fund paid the Manager a monthly fee based on a percentage of the Fund’s average daily net assets at the following annual rates:

Average Daily Net Assets	Investment Advisory Fee
First $1 Billion		0.500	%
$1 Billion – $3 Billion		0.470
$3 Billion – $5 Billion		0.450
$5 Billion – $10 Billion		0.440
Greater Than $10 Billion		0.430

The Manager contractually agreed to waive and/or reimburse fees or expenses, excluding interest expense, dividend expense, acquired fund fees and expenses and certain other fund expenses, in order to limit expenses to 0.62% of the Fund’s average daily net assets. The Manager has agreed not to reduce or discontinue this contractual waiver or reimbursement prior to May 1, 2012 unless approved by the Board, including a majority of the Independent Trustees. This expense limit applies to the aggregate expenses incurred on the BlackRock Share class. These amounts are shown as fees waived by advisor, administration fees waived, transfer agent fees waived and transfer agent fees reimbursed, respectively, in the Statement of Operations. For the six months ended June 30, 2011, the Manager waived $13,220 of investment advisory fees which is included in fees waived by advisor.

The Manager voluntarily agreed to waive its investment advisory fees by the amount of investment advisory fees the Fund pays to the Manager indirectly through its investment in affiliated money market funds, however the Manager does not waive its investment advisory fees by the amount of investment advisory fees paid through the Fund’s investment in other affiliated investment companies, if any. This amount is included in fees waived by advisor in the Statement of Operations. For the six months ended June 30, 2011, the Manager waived $1,576.

If during the Fund’s fiscal year the operating expenses of the BlackRock Share class, that at any time during the prior two fiscal years received a waiver or reimbursement from the Manager, are less than the expense limit for the BlackRock Share class, the Manager is entitled to be reimbursed by the BlackRock Share class up to the lesser of (a) the amount of fees waived or expenses reimbursed during those prior two fiscal years under the agreement and (b) the amount by which the expense limit for the BlackRock Share class exceeds the operating expenses of the

14 BLACKROCK EXCHANGE PORTFOLIO JUNE 30, 2011

Notes to Financial Statements (continued)

BlackRock Share class for the current fiscal year, provided that: (1) the Fund has more than $50 million in assets for the fiscal year and (2) the Manager or an affiliate continues to serve as the Fund’s investment advisor or administrator. In the event the expense limit for a the BlackRock Share class is changed subsequent to a fiscal year in which the Manager becomes entitled to reimbursement for fees waived or reimbursed, the amount available to reimburse the Manager shall be calculated by reference to the expense limit for the BlackRock Share class in effect at the time the Manager became entitled to receive such reimbursement, rather than the subsequently changed expense limit for the BlackRock Share class.

On June 30, 2011, the amounts subject to possible future recoupment under the expense limitation agreement are as follows:

Expiring December 31,
2011		2012		2013
$	127,694	$	89,309	$	44,460

BNY Mellon Investment Servicing (US) Inc. (“BNYMIS”) and the Manager act as co-administrators for the Fund. For these services, the co-administrators receive a combined administration fee computed daily and payable monthly, based on a percentage of the average daily net assets of the Fund. The combined administration fee is paid at the following annual rates: 0.075% of the first $500 million, 0.065% of the next $500 million and 0.055% of average daily net assets in excess of $1 billion. In addition, the Fund is charged an administration fee based on the following percentages of average daily net assets of the BlackRock Share class: 0.025% of the first $500 million, 0.015% of the next $500 million and 0.005% of average daily net assets in excess of $1 billion. In addition, BNYMIS and the Manager may have, at their discretion, voluntarily waived all or any portion of their administration fees for the Fund which are included in administration fees waived in the Statement of Operations. For the six months ended June 30, 2011, the Fund paid $54,957 to affiliates in return for these services, which are included in administration in the Statement of Operations.

The Fund received an exemptive order from the SEC permitting it, among other things, to pay an affiliated securities lending agent a fee based on a share of the income derived from the securities lending activities and has retained BlackRock Investment Management, LLC (“BIM”) as the securities lending agent. BIM may, on behalf of the Fund, invest cash collateral received by the Fund for such loans, among other things, in a private investment company managed by the Manager or in registered money market funds advised by the Manager or its affiliates. The market value of securities on loan and the value of the related collateral, if applicable, are shown in the Statement of Assets and Liabilities as securities lending income receivable – affiliated and collateral on securities loaned at value, respectively. The cash collateral invested by BIM is disclosed in the Schedule of Investments. The share of income earned by the Fund on such investments is shown as securities lending – affiliated in the Statement of Operations. For the six months ended June 30, 2011, BIM received $1,556 in securities lending agent fees related to securities lending activities for the Fund.

Certain officers and/or Trustees of the Trust are officers and/or directors of BlackRock or its affiliates. The Trust reimburses the Manager for compensation paid to the Trust’s Chief Compliance Officer.

3. Investments:

Purchases and sales of investments, excluding short-term securities, for the six months ended June 30, 2011, were $0 and $374,284, including $374,284 of sales representing redemptions-in-kind, respectively.

4. Borrowings:

The Trust, on behalf of the Fund, along with certain other funds managed by the Manager and its affiliates, is party to a $500 million credit agreement with a group of lenders, which expires in November 2011. The Fund may borrow under the credit agreement to fund shareholder redemptions. The Fund pays a commitment fee of 0.08% per annum based on the Fund’s pro rata share of the unused portion of the credit agreement and interest at a rate equal to the higher of (a) the one-month LIBOR plus 1.00% per annum and (b) the Fed Funds rate plus 1.00% per annum on amounts borrowed. In addition, the Fund paid administration and arrangement fees which were allocated to the Fund based on its net assets as of October 31, 2010. The Fund did not borrow under the credit agreement during the six months ended June 30, 2011.

5. Capital Loss Carryforward:

As of December 31, 2010, the Fund had a capital loss carryforward of $196,235 available to offset future realized capital gains, which expire December 31, 2016.

Under the recently enacted Regulated Investment Company Modernization Act of 2010, capital losses incurred by the Fund after December 31, 2010 will not be subject to expiration. In addition, these losses must be utilized prior to the losses incurred in pre-enactment taxable years.

6. Concentration, Market and Credit Risk:

In the normal course of business, the Fund invests in securities and enters into transactions where risks exist due to fluctuations in the market (market risk) or failure of the issuer of a security to meet all its obligations (issuer credit risk). The value of securities held by the Fund may decline in response to certain events, including those directly involving the issuers whose securities are owned by the Fund; conditions affecting the general economy; overall market changes; local, regional or global political, social or economic instability; and currency and interest rate and price fluctuations. Similar to issuer credit risk, the Fund may be exposed to counterparty credit risk, or the risk that an entity with which the Fund has unsettled or open transactions may fail to or be unable to perform on its commitments. The Fund manages counterparty credit risk by entering into transactions only with counterparties that it believes have the financial resources to honor their obligations and by monitoring the financial stability of those counterparties. Financial assets, which potentially expose the Fund to market, issuer and counterparty credit risks, consist principally of financial instruments and receivables due from counterparties. The extent of the Fund’s exposure to market, issuer

BLACKROCK EXCHANGE PORTFOLIO JUNE 30, 2011 15

Notes to Financial Statements (concluded)

and counterparty credit risks with respect to these financial assets is generally approximated by their value recorded in the Fund’s Statement of Assets and Liabilities, less any collateral held by the Fund.

7. Capital Shares Transactions:

Transactions in BlackRock Shares were as follows:

	Six Months Ended June 30, 2011			Year Ended December 31, 2010
Shares issued in reinvestment of dividends		129			926
Shares redeemed		(3,803	)1		(9,391	)2
Net decrease		(3,674	)		(8,465	)

¹  Including (612) representing redemptions-in-kind.

²  Including (3,986) representing redemptions-in-kind.

8. Subsequent Events:

Management has evaluated the impact of all subsequent events on the Fund through the date the financial statements were issued and has determined that there were no subsequent events requiring adjustment or additional disclosure in the financial statements.

16 BLACKROCK EXCHANGE PORTFOLIO JUNE 30, 2011

Disclosure of Investment Advisory Agreement

The Board of Trustees (the “Board,” and the members of which are referred to as “Board Members”) of BlackRock FundsSM (the “Trust”) met on April 5, 2011 and May 17-18, 2011 to consider the approval of the Trust’s investment advisory agreement (the “Agreement”) with BlackRock Advisors, LLC (the “Manager”), the Trust’s investment advisor, on behalf of BlackRock Exchange Portfolio (the “Fund”), a series of the Trust.

Activities and Composition of the Board

The Board consists of thirteen individuals, eleven of whom are not “interested persons” of the Trust as defined in the Investment Company Act of 1940, as amended (the “1940 Act”) (the “Independent Board Members”). The Board Members are responsible for the oversight of the operations of the Fund and perform the various duties imposed on the directors of investment companies by the 1940 Act. The Independent Board Members have retained independent legal counsel to assist them in connection with their duties. The Co-Chairs of the Board are each Independent Board Members. The Board has established five standing committees: an Audit Committee, a Governance and Nominating Committee, a Compliance Committee, a Performance Oversight and Contract Committee and an Executive Committee, each of which is composed of Independent Board Members (except for the Executive Committee, which also has one interested Board Member) and is chaired by Independent Board Members. The Board also established an ad hoc committee, the Joint Product Pricing Committee, which consisted of Independent Board Members and directors/trustees of the boards of certain other BlackRock-managed funds, who were not “interested persons” of their respective funds.

The Agreement

Pursuant to the 1940 Act, the Board is required to consider the continuation of the Agreement on an annual basis. In connection with this process, the Board assessed, among other things, the nature, scope and quality of the services provided to the Fund by BlackRock, its personnel and its affiliates, including investment management, administrative and shareholder services, oversight of fund accounting and custody, marketing services, risk oversight, compliance program and assistance in meeting applicable legal and regulatory requirements.

The Board, acting directly and through its committees, considers at each of its meetings, and from time to time as appropriate, factors that are relevant to its annual consideration of the renewal of the Agreement, including the services and support provided by BlackRock to the Fund and its shareholders. Among the matters the Board considered were: (a) investment performance for one-, three- and five-year periods, as applicable, against peer funds, and applicable benchmarks, if any, as well as senior management’s and portfolio managers’ analysis of the reasons for any over performance or underperformance against its peers and/or benchmark, as applicable; (b) fees, including advisory, administration, if applicable, and other amounts paid to BlackRock and its affiliates by the Fund for services, such as transfer agency, marketing and distribution, call center and fund accounting; (c) Fund operating expenses and how BlackRock allocates expenses to the Fund; (d) the resources devoted to, risk oversight of, and compliance reports relating to, implementation of the Fund’s investment objective, policies and restrictions; (e) the Fund’s compliance with its Code of Ethics and other compliance policies and procedures; (f) the nature, cost and character of non-investment management services provided by BlackRock and its affiliates; (g) BlackRock’s and other service providers’ internal controls and risk and compliance oversight mechanisms; (h) BlackRock’s implementation of the proxy voting policies approved by the Board; (i) the use of brokerage commissions and execution quality of portfolio transactions; (j) BlackRock’s implementation of the Fund’s valuation and liquidity procedures; (k) an analysis of contractual and actual management fees for products with similar investment objectives across the open-end fund, exchange traded fund (“ETF”), closed-end fund and institutional account product channels, as applicable; (l) BlackRock’s compensation methodology for its investment professionals and the incentives it creates; and (m) periodic updates on BlackRock’s business.

Board Considerations in Approving the Agreement

The Approval Process: Prior to the April 5, 2011 meeting, the Board requested and received materials specifically relating to the Agreement. The Board is engaged in a process with BlackRock to review periodically the nature and scope of the information provided to better assist its deliberations. The materials provided in connection with the April meeting included (a) information independently compiled and prepared by Lipper, Inc. (“Lipper”) on fees and expenses and the investment performance of the Fund as compared with a peer group of funds as determined by Lipper (collectively, “Peers”); (b) information on the profitability of the Agreement to BlackRock and a discussion of fall-out benefits to BlackRock and its affiliates and significant shareholders; (c) a general analysis provided by BlackRock concerning investment management fees (a combination of the advisory fee and the administration fee, if any) charged to other clients, such as institutional clients, ETFs and closed-end funds, under similar investment mandates, as well as the performance of such other clients, as applicable; (d) the impact of economies of scale; (e) a summary of aggregate amounts paid by the Fund to BlackRock; (f) sales and redemption data regarding the Fund’s shares; and (g) if applicable, a comparison of management fees to similar BlackRock open-end funds, as classified by Lipper.

At an in-person meeting held on April 5, 2011, the Board reviewed materials relating to its consideration of the Agreement. As a result of the discussions that occurred during the April 5, 2011 meeting, and as a culmination of the Board’s year-long deliberative process, the Board presented BlackRock with questions and requests for additional information. BlackRock responded to these requests with additional written information in advance of the May 17-18, 2011 Board meeting.

At an in-person meeting held on May 17-18, 2011, the Board, including the Independent Board Members, unanimously approved the continuation of the Agreement between the Manager and the Trust with respect to the Fund for a one-year term ending June 30, 2012. In approving the continuation of the Agreement, the Board considered: (a) the nature,

BLACKROCK EXCHANGE PORTFOLIO JUNE 30, 2011 17

Disclosure of Investment Advisory Agreement (continued)

extent and quality of the services provided by BlackRock; (b) the investment performance of the Fund and BlackRock; (c) the advisory fee and the cost of the services and profits to be realized by BlackRock and its affiliates from their relationship with the Fund; (d) economies of scale; (e) fall out benefits to BlackRock as a result of its relationship with the Fund; and (f) other factors deemed relevant by the Board Members.

The Board also considered other matters it deemed important to the approval process, such as payments made to BlackRock or its affiliates relating to the distribution of Fund shares, services related to the valuation and pricing of Fund portfolio holdings, direct and indirect benefits to BlackRock and its affiliates and significant shareholders from their relationship with the Fund and advice from independent legal counsel with respect to the review process and materials submitted for the Board’s review. The Board noted the willingness of BlackRock personnel to engage in open, candid discussions with the Board. The Board did not identify any particular information as controlling, and each Board Member may have attributed different weights to the various items considered.

A. Nature, Extent and Quality of the Services Provided by BlackRock:

The Board, including the Independent Board Members, reviewed the nature, extent and quality of services provided by BlackRock, including the investment advisory services and the resulting performance of the Fund. Throughout the year, the Board compared Fund performance to the performance of a comparable group of mutual funds and/or the performance of a relevant benchmark, if any. The Board met with BlackRock’s senior management personnel responsible for investment operations, including the senior investment officers. The Board also reviewed the materials provided by the Fund’s portfolio management team discussing Fund performance and the Fund’s investment objective, strategies and outlook.

The Board considered, among other factors, the number, education and experience of BlackRock’s investment personnel generally and the Fund’s portfolio management team, investments by portfolio managers in the funds they manage, BlackRock’s portfolio trading capabilities, BlackRock’s use of technology, BlackRock’s commitment to compliance, BlackRock’s credit analysis capabilities, BlackRock’s risk analysis capabilities and BlackRock’s approach to training and retaining portfolio managers and other research, advisory and management personnel. The Board engaged in a review of BlackRock’s compensation structure with respect to the Fund’s portfolio management team and BlackRock’s ability to attract and retain high-quality talent and create performance incentives.

In addition to advisory services, the Board considered the quality of the administrative and non-investment advisory services provided to the Fund. BlackRock and its affiliates and significant shareholders provide the Fund with certain administrative, transfer agency, shareholder and other services (in addition to any such services provided to the Fund by third parties) and officers and other personnel as are necessary for the operations of the Fund. In addition to investment advisory services, BlackRock and its affiliates provide the Fund with other services, including (i) preparing disclosure documents, such as the prospectus, the statement of additional information and periodic shareholder reports; (ii) assisting with daily accounting and pricing; (iii) overseeing and coordinating the activities of other service providers; (iv) organizing Board meetings and preparing the materials for such Board meetings; (v) providing legal and compliance support; and (vi) performing other administrative functions necessary for the operation of the Fund, such as tax reporting, fulfilling regulatory filing requirements and call center services. The Board reviewed the structure and duties of BlackRock’s fund administration, accounting, legal and compliance departments and considered BlackRock’s policies and procedures for assuring compliance with applicable laws and regulations.

B. The Investment Performance of the Fund and BlackRock: The Board, including the Independent Board Members, also reviewed and considered the performance history of the Fund. In preparation for the April 5, 2011 meeting, the Board worked with BlackRock and Lipper to develop a template for, and was provided with, reports independently prepared by Lipper, which included a comprehensive analysis of the Fund’s performance. The Board also reviewed a narrative and statistical analysis of the Lipper data that was prepared by BlackRock, which analyzed various factors that affect Lipper’s rankings. In connection with its review, the Board received and reviewed information regarding the investment performance of the Fund as compared to funds in the Fund’s applicable Lipper category. The Board was provided with a description of the methodology used by Lipper to select peer funds. The Board and the Board’s Performance Oversight and Contract Committee regularly review and meet with Fund management to discuss the performance of the Fund throughout the year.

The Board noted that, in general, the Fund performed better than its Peers in that the Fund’s performance was at or above the median of its Lipper Performance Universe in two of the one-, three- and five-year periods reported.

The Board noted that BlackRock has made changes to the organization of the overall equity group management structure designed to result in a strengthened leadership team with clearer accountability.

C. Consideration of the Advisory/Management Fees and the Cost of the Services and Profits to be Realized by BlackRock and its Affiliates from their Relationship with the Fund: The Board, including the Independent Board Members, reviewed the Fund’s contractual management fee ratio compared with the other funds in its Lipper category. It also compared the Fund’s total expense ratio, as well as actual management fee ratio, to those of other funds in its Lipper category. The Board considered the services provided and the fees charged by BlackRock to other types of clients with similar investment mandates, including separately managed institutional accounts.

18 BLACKROCK EXCHANGE PORTFOLIO JUNE 30, 2011

Disclosure of Investment Advisory Agreement (continued)

The Board received and reviewed statements relating to BlackRock’s financial condition and profitability with respect to the services it provided the Fund. The Board was also provided with a profitability analysis that detailed the revenues earned and the expenses incurred by BlackRock for services provided to the Fund. The Board reviewed BlackRock’s profitability with respect to the Fund and other funds the Board currently oversees for the year ended December 31, 2010 compared to available aggregate profitability data provided for the years ended December 31, 2009 and December 31, 2008. The Board reviewed BlackRock’s profitability with respect to other fund complexes managed by the Manager and/or its affiliates.

The Board reviewed BlackRock’s assumptions and methodology of allocating expenses in the profitability analysis, noting the inherent limitations in allocating costs among various advisory products. The Board recognized that profitability may be affected by numerous factors including, among other things, fee waivers and expense reimbursements by the Manager, the types of funds managed, expense allocations and business mix, and the difficulty of comparing profitability as a result of those factors.

The Board noted that, in general, individual fund or product line profitability of other advisors is not publicly available. The Board considered BlackRock’s operating margin, in general, compared to the operating margin for leading investment management firms whose operations include advising open-end funds, among other product types. That data indicates that operating margins for BlackRock, in general and with respect to its registered funds, are generally consistent with margins earned by similarly situated publicly traded competitors. In addition, the Board considered, among other things, certain third party data comparing BlackRock’s operating margin with that of other publicly-traded asset management firms. That third party data indicates that larger asset bases do not, in themselves, translate to higher profit margins.

In addition, the Board considered the cost of the services provided to the Fund by BlackRock, and BlackRock’s and its affiliates’ profits relating to the management and distribution of the Fund and the other funds advised by BlackRock and its affiliates. As part of its analysis, the Board reviewed BlackRock’s methodology in allocating its costs to the management of the Fund. The Board also considered whether BlackRock has the financial resources necessary to attract and retain high quality investment management personnel to perform its obligations under the Agreement and to continue to provide the high quality of services that is expected by the Board.

The Board noted that the Fund’s contractual management fee ratio (a combination of the advisory fee and the administration fee, if any) was lower than or equal to the median contractual management fee ratio paid by the Fund’s Peers, in each case before taking into account any expense reimbursements or fee waivers. The Board also noted that effective June 1, 2011, the Fund has an advisory fee arrangement that includes breakpoints that adjust the fee ratio downward as the size of the Fund increases above certain contractually specified levels. The Board also noted that BlackRock has contractually agreed to waive fees and/or reimburse expenses in order to limit, to a specified amount, the Fund’s total operating expenses as a percentage of the Fund’s average daily net assets.

D. Economies of Scale: The Board, including the Independent Board Members, considered the extent to which economies of scale might be realized as the assets of the Fund increase. The Board also considered the extent to which the Fund benefits from such economies and whether there should be changes in the advisory fee rate or structure in order to enable the Fund to participate in these economies of scale, for example through the use of breakpoints in the advisory fee based upon the asset level of the Fund.

E. Other Factors Deemed Relevant by the Board Members: The Board, including the Independent Board Members, also took into account other ancillary or “fall-out” benefits that BlackRock or its affiliates and significant shareholders may derive from their respective relationships with the Fund, both tangible and intangible, such as BlackRock’s ability to leverage its investment professionals who manage other portfolios and risk management personnel, an increase in BlackRock’s profile in the investment advisory community, and the engagement of BlackRock’s affiliates and significant shareholders as service providers to the Fund, including for administrative, transfer agency, distribution and securities lending services. The Board also considered BlackRock’s overall operations and its efforts to expand the scale of, and improve the quality of, its operations. The Board also noted that BlackRock may use and benefit from third party research obtained by soft dollars generated by certain registered fund transactions to assist in managing all or a number of its other client accounts. The Board further noted that BlackRock’s funds may invest in affiliated ETFs without any offset against the management fees payable by the funds to BlackRock.

In connection with its consideration of the Agreement, the Board also received information regarding BlackRock’s brokerage and soft dollar practices. The Board received reports from BlackRock which included information on brokerage commissions and trade execution practices throughout the year.

The Board noted the competitive nature of the open-end fund marketplace, and that shareholders are able to redeem their Fund shares if they believe that the Fund’s fees and expenses are too high or if they are dissatisfied with the performance of the Fund.

Conclusion

The Board, including the Independent Board Members, unanimously approved the continuation of the Agreement between the Manager and the Trust with respect to the Fund for a one-year term ending June 30, 2012. As part of its approval, the Board considered the detailed review of BlackRock’s fee structure, as it applies to the Fund, conducted by the ad hoc Joint Product Pricing Committee. Based upon its evaluation of all of the aforementioned factors in their totality, the Board, including the

BLACKROCK EXCHANGE PORTFOLIO JUNE 30, 2011 19

Disclosure of Investment Advisory Agreement (concluded)

Independent Board Members, was satisfied that the terms of the Agreement were fair and reasonable and in the best interest of the Fund and its shareholders. In arriving at its decision to approve the Agreement, the Board did not identify any single factor or group of factors as all-important or controlling, but considered all factors together, and different Board Members may have attributed different weights to the various factors considered. The Independent Board Members were also assisted by the advice of independent legal counsel in making this determination. The contractual fee arrangements for the Fund reflect the results of several years of review by the Board Members and predecessor Board Members, and discussions between such Board Members (and predecessor Board Members) and BlackRock. As a result, the Board Members’ conclusions may be based in part on their consideration of these arrangements in prior years.

20 BLACKROCK EXCHANGE PORTFOLIO JUNE 30, 2011

Officers and Trustees

Ronald W. Forbes, Co-Chairman of the Board and Trustee

Rodney D. Johnson, Co-Chairman of the Board and Trustee

David O. Beim, Trustee

Richard S. Davis, Trustee

Henry Gabbay, Trustee

Dr. Matina S. Horner, Trustee

Herbert I. London, Trustee

Cynthia A. Montgomery, Trustee

Joseph P. Platt, Trustee

Robert C. Robb, Jr., Trustee

Toby Rosenblatt, Trustee

Kenneth L. Urish, Trustee

Frederick W. Winter, Trustee

John M. Perlowski, President and Chief Executive Officer

Richard Hoerner, CFA, Vice President

Brendan Kyne, Vice President

Simon Mendelson, Vice President

Christopher Stavrakos, CFA, Vice President

Neal Andrews, Chief Financial Officer

Jay Fife, Treasurer

Brian Kindelan, Chief Compliance Officer and Anti-Money Laundering Officer

Ira P. Shapiro, Secretary

Investment Advisor and Co-Administrator

BlackRock Advisors, LLC

Wilmington, DE 19809

Accounting Agent, Co-Administrator and Transfer Agent

BNY Mellon Investment Servicing (US) Inc.

Wilmington, DE 19809

Custodian

The Bank of New York Mellon

New York, NY 10286

Distributor

BlackRock Investments, LLC

New York, NY 10022

Legal Counsel

Sidley Austin LLP

New York, NY 10019

Independent Registered Public Accounting Firm

Deloitte & Touche LLP

Philadelphia, PA 19103

Address of the Trust

100 Bellevue Parkway

Wilmington, DE 19809

BLACKROCK EXCHANGE PORTFOLIO JUNE 30, 2011 21

Additional Information

General Information

Electronic Delivery

Electronic copies of most financial reports and prospectuses are available on the Fund’s website or shareholders can sign up for e-mail notifications of quarterly statements, annual and semi-annual reports and prospectuses by enrolling in the Fund’s electronic delivery program.

To enroll:

Shareholders Who Hold Accounts with Investment Advisors, Banks or Brokerages:

Please contact your financial advisor. Please note that not all investment advisors, banks or brokerages may offer this service.

Shareholders Who Hold Accounts Directly With BlackRock

1) Access the BlackRock website at http://www.blackrock.com/edelivery

2) Select “eDelivery” under the “More Information” section

3) Log into your account

Householding

The Fund will mail only one copy of shareholder documents, including annual and semi-annual reports and proxy statements, to shareholders with multiple accounts at the same address. This practice is commonly called “householding” and it is intended to reduce expenses and eliminate duplicate mailings of shareholder documents. Mailings of your shareholder documents may be householded indefinitely unless you instruct us otherwise. If you do not want the mailing of these documents to be combined with those for other members of your household, please contact the Fund at (800) 441-7762.

Availability of Quarterly Portfolio Schedule

The Fund files its complete schedule of portfolio holdings with the Securities and Exchange Commission (the “SEC”) for the first and third quarters of each fiscal year on Form N-Q. The Fund’s Forms N-Q are available on the SEC’s website at http://www.sec.gov and may also be reviewed and copied at the SEC’s Public Reference Room in Washington, D.C. Information on how to access documents on the SEC’s website without charge may be obtained by calling (800) SEC-0330. The Fund’s Forms N-Q may also be obtained upon request and without charge by calling (800) 441-7762.

Availability of Proxy Voting Policies and Procedures

A description of the policies and procedures that the Fund uses to determine how to vote proxies relating to portfolio securities is available (1) without charge, upon request, by calling (800) 441-7762; (2) at http://www.blackrock.com; and (3) on the SEC’s website at http://www.sec.gov.

Availability of Proxy Voting Record

Information about how the Fund voted proxies relating to securities held in the Fund’s portfolios during the most recent 12-month period ended June 30 is available, upon request and without charge (1) at http://www.blackrock.com or by calling (800) 441-7762 and (2) on the SEC’s website at http://www.sec.gov.

Shareholder Privileges

Account Information

Call us at (800) 441-7762 from 8:00 AM to 6:00 PM EST on any business day to get information about your account balances, recent transactions and share prices. You can also reach us on the Web at http://www.blackrock.com/funds.

Automatic Investment Plans

Investor Class shareholders who want to invest regularly can arrange to have $50 or more automatically deducted from their checking or savings account and invested in any of the BlackRock funds.

Systematic Withdrawal Plan

Investor Class shareholders can establish a systematic withdrawal plan and receive periodic payments of $50 or more from their BlackRock funds, as long as their account balance is at least $10,000.

Retirement Plans

Shareholders may make investments in conjunction with Traditional, Rollover, Roth, Coverdell, Simple IRAs, SEP IRAs and 403(b) Plans.

22 BLACKROCK EXCHANGE PORTFOLIO JUNE 30, 2011

Additional Information (concluded)

BlackRock Privacy Principles

BlackRock is committed to maintaining the privacy of its current and former fund investors and individual clients (collectively, “Clients”) and to safeguarding their non-public personal information. The following information is provided to help you understand what personal information BlackRock collects, how we protect that information and why in certain cases we share such information with select parties.

If you are located in a jurisdiction where specific laws, rules or regulations require BlackRock to provide you with additional or different privacy-related rights beyond what is set forth below, then BlackRock will comply with those specific laws, rules or regulations.

BlackRock obtains or verifies personal non-public information from and about you from different sources, including the following: (i) information we receive from you or, if applicable, your financial intermediary, on applications, forms or other documents; (ii) information about your transactions with us, our affiliates, or others; (iii) information we receive from a consumer reporting agency; and (iv) from visits to our websites.

BlackRock does not sell or disclose to non-affiliated third parties any non-public personal information about its Clients, except as permitted by law or as is necessary to respond to regulatory requests or to service Client accounts. These non-affiliated third parties are required to protect the confidentiality and security of this information and to use it only for its intended purpose.

We may share information with our affiliates to service your account or to provide you with information about other BlackRock products or services that may be of interest to you. In addition, BlackRock restricts access to non-public personal information about its Clients to those BlackRock employees with a legitimate business need for the information. BlackRock maintains physical, electronic and procedural safeguards that are designed to protect the non-public personal information of its Clients, including procedures relating to the proper storage and disposal of such information.

BLACKROCK EXCHANGE PORTFOLIO JUNE 30, 2011 23

A World-Class Mutual Fund Family

BlackRock offers a diverse lineup of open-end mutual funds crossing all investment styles and managed by experts in equity, fixed income and tax-exempt investing.

Equity Funds
BlackRock ACWI ex-US Index Fund BlackRock All-Cap Energy & Resources Portfolio BlackRock Asset Allocation Portfolio† BlackRock Balanced Capital Fund† BlackRock Basic Value Fund BlackRock Capital Appreciation Fund BlackRock China Fund BlackRock Energy & Resources Portfolio BlackRock Equity Dividend Fund BlackRock EuroFund BlackRock Focus Growth Fund BlackRock Focus Value Fund BlackRock Global Allocation Fund† BlackRock Global Dividend Income Portfolio BlackRock Global Dynamic Equity Fund BlackRock Global Emerging Markets Fund BlackRock Global Growth Fund	BlackRock Global Opportunities Portfolio BlackRock Global SmallCap Fund BlackRock Health Sciences Opportunities Portfolio BlackRock Healthcare Fund BlackRock Index Equity Portfolio BlackRock India Fund BlackRock International Fund BlackRock International Index Fund BlackRock International Opportunities Portfolio BlackRock Large Cap Core Fund BlackRock Large Cap Core Plus Fund BlackRock Large Cap Growth Fund BlackRock Large Cap Value Fund BlackRock Latin America Fund BlackRock Mid-Cap Growth Equity Portfolio BlackRock Mid-Cap Value Equity Portfolio			BlackRock Mid Cap Value Opportunities Fund BlackRock Natural Resources Trust BlackRock Pacific Fund BlackRock Russell 1000 Index Fund BlackRock Science & Technology Opportunities Portfolio BlackRock Small Cap Growth Equity Portfolio BlackRock Small Cap Growth Fund II BlackRock Small Cap Index Fund BlackRock Small/Mid-Cap Growth Portfolio BlackRock S&P 500 Index Fund BlackRock S&P 500 Stock Fund BlackRock U.S. Opportunities Portfolio BlackRock Utilities and Telecommunications Fund BlackRock Value Opportunities Fund BlackRock World Gold Fund
Fixed Income Funds
BlackRock Bond Index Fund BlackRock Core Bond Fund BlackRock Emerging Market Debt Portfolio BlackRock Floating Rate Income Portfolio BlackRock GNMA Portfolio BlackRock High Income Fund	BlackRock High Yield Bond Portfolio BlackRock Income Portfolio† BlackRock Inflation Protected Bond Portfolio BlackRock International Bond Portfolio BlackRock Long Duration Bond Portfolio BlackRock Low Duration Bond Portfolio			BlackRock Multi-Sector Bond Portfolio BlackRock Strategic Income Opportunities Portfolio BlackRock Total Return Fund BlackRock US Government Bond Fund BlackRock World Income Fund US Mortgage Portfolio
Municipal Bond Funds
BlackRock California Municipal Bond Fund BlackRock High Yield Municipal Fund BlackRock Intermediate Municipal Fund	BlackRock National Municipal Fund BlackRock New Jersey Municipal Bond Fund BlackRock New York Municipal Bond Fund			BlackRock Pennsylvania Municipal Bond Fund BlackRock Short-Term Municipal Fund
Target Risk & Target Date Funds†
BlackRock Prepared Portfolios	BlackRock Lifecycle Prepared Portfolios		LifePath Portfolios		LifePath Index Portfolios
Conservative Prepared Portfolio	2015	2035	Retirement	2040	Retirement	2040
Moderate Prepared Portfolio	2020	2040	2020	2045	2020	2045
Growth Prepared Portfolio	2025	2045	2025	2050	2025	2050
Aggressive Growth Prepared Portfolio	2030	2050	2030	2055	2030	2055
			2035		2035

† Mixed asset fund.

BlackRock mutual funds are currently distributed by BlackRock Investments, LLC. You should consider the investment objectives, risks, charges and expenses of the funds under consideration carefully before investing. Each fund’s prospectus contains this and other information and is available at www.blackrock.com or by calling (800) 441-7762 or from your financial advisor. The prospectus should be read carefully before investing.

24 BLACKROCK EXCHANGE PORTFOLIO JUNE 30, 2011

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This report is transmitted to shareholders only. It is not authorized for use as an offer of sale or a solicitation of an offer to buy shares of the Fund unless accompanied or preceded by the Fund’s current prospectus. Past performance results shown in this report should not be considered a representation of future performance. Investment returns 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.

EXCH-6/11-SAR

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	–	Investments
		(a) The registrant’s Schedule of Investments is included as part of the Report to Stockholders filed under Item 1 of this Form.
		(b) Not Applicable due to no such divestments during the semi-annual period covered since the previous Form N-CSR filing.
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 – There have been no material changes to these procedures.
Item 11	–	Controls and Procedures
11(a)	–	The registrant’s principal executive and principal financial officers, or persons performing similar functions, have concluded that the registrant’s disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940, as amended (the “1940 Act”)) are effective as of a date within 90 days of the filing of this report based on the evaluation of these controls and procedures required by Rule 30a-3(b) under the 1940 Act and Rule 15d-15(b) under the Securities Exchange Act of 1934, as amended.
11(b)	–	There were no changes in the registrant’s internal control over financial reporting (as defined in Rule 30a-3(d) under the 1940 Act) that occurred during the second fiscal quarter of the period covered by this report that have materially affected, or are 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

3

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.

BlackRock Funds
By:	/s/ John M. Perlowski
	John M. Perlowski
	Chief Executive Officer (principal executive officer) of BlackRock Funds

Date: September 2, 2011

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/ John M. Perlowski
	John M. Perlowski
	Chief Executive Officer (principal executive officer) of BlackRock Funds

Date: September 2, 2011

By:	/s/ Neal J. Andrews
	Neal J. Andrews
	Chief Financial Officer (principal financial officer) of BlackRock Funds

Date: September 2, 2011

4