months of 2020, the following main currencies relevant to our operations decreased in value against the U.S. dollar: Argentinian peso by 34%, Brazilian real by 23%, Turkish lira by 16%, Chilean peso by 15%, Mexican peso by 12% and Russian ruble by 8% (all compared on a nine-month average basis). The following main currencies relevant to our operations increased in value against the U.S. dollar: Swiss franc by 5%, new Israeli shekel by 3% and Japanese yen by 1%.
As a result, exchange rate movements during the first nine months of 2020 negatively impacted overall revenues by $68 million and our operating loss by $28 million, in comparison to the first nine months of 2019. In the first nine months of 2020, the positive hedging impact recognized under revenues was $36 million, partially offset by a positive impact of $3 million recognized under cost of sales, in comparison to the first nine months of 2019. Hedging transactions against future projected revenues and expenses are recognized on the balance sheet at their fair value on a quarterly basis, while the foreign exchange impact on the underlying revenues and expenses may occur in subsequent quarters. See note 8d to our consolidated financial statements.
Liquidity and Capital Resources
Total balance sheet assets were $49,737 million as of September 30, 2020, compared to $54,991 million as of June 30, 2020.
Our working capital balance, which includes accounts receivables net of SR&A, inventories, prepaid expenses and other current assets, accounts payables, employee-related obligations, accrued expenses and other current liabilities, was $223 million as of September 30, 2020, compared to $209 million as of June 30, 2020.
Cash investment in property, plant and equipment in the third quarter of 2020 was $143 million, compared to $131 million in the second quarter of 2020. Depreciation in the third quarter of 2020 was $130 million, compared to $134 million in the second quarter of 2020.
Cash and cash equivalents and short-term and long-term investments as of September 30, 2020 were $2,155 million, compared to $2,431 million as of June 30, 2020. The decrease in the third quarter of 2020 was mainly due to repayment at maturity of our €1,010 million 0.375% senior notes.
Our cash on hand that is not used for ongoing operations is generally invested in bank deposits as well as liquid securities that bear fixed and floating rates.
Our principal sources of short-term liquidity are our cash on hand, existing cash investments, liquid securities and available credit facilities, primarily our $2.3 billion unsecured syndicated revolving credit facility entered into in April 2019 (“RCF”).
The RCF agreement provides for two separate tranches, a $1.15 billion tranche A and a $1.15 billion tranche B. Loans and letters of credit will be available from time to time under each tranche for Teva’s general corporate purposes. Tranche A has a maturity date of April 8, 2022, with two
one-year
extension options, of which $1.065 billion were extended to April 8, 2023. Tranche B has a maturity date of April 8, 2024.
The RCF contains certain covenants, including certain limitations on incurring liens and indebtedness and maintenance of certain financial ratios, including the requirement to maintain compliance with a net debt to EBITDA ratio, which becomes more restrictive over time. The net debt to EBITDA ratio limit is 5.75x in the third and fourth quarters of 2020 and declines to 5.50x in the first and second quarters of 2021, and continues to gradually decline over the remaining term of the RCF.
The RCF can be used for general corporate purposes, including repaying existing debt. As of September 30, 2020, €100 million was outstanding under the RCF. As of the date of this Quarterly Report on Form
10-Q,
€270 million was outstanding under the RCF. Based on current and forecasted results, we expect that we will not exceed the financial covenant thresholds set forth in the RCF within one year from the date the financial statements are issued.
Under specified circumstances, including
non-compliance
with any of the covenants described above and the unavailability of any waiver, amendment or other modification thereto, we will not be able to borrow under the RCF. Additionally, violations of the covenants, under the above-mentioned circumstances, would result in an event of default in all borrowings under the RCF and, when greater than a specified threshold amount as set forth in each series of senior notes is outstanding, could lead to an event of default under our senior notes due to cross acceleration provisions.
We expect that we will continue to have sufficient cash resources to support our debt service payments and all other financial obligations within one year from the date that the financial statements are issued.
Debt Balance and Movements
As of September 30, 2020, our debt was $25,621 million, compared to $26,266 million as of June 30, 2020. This decrease was mainly due to the repayment at maturity of our €1,010 million 0.375% senior notes in July 2020, partially offset by exchange rate fluctuations.
In March 2020, we repaid at maturity our $700 million 2.25% senior notes.
In July 2020, we repaid at maturity our €1,010 million 0.375% senior notes.