Financing Activities
Net cash used in financing activities of $394.9 million in the nine months ended September 30, 2020 decreased significantly from $738.8 million net cash used in the nine months ended September 30, 2019, mainly due to our third quarter of 2020 issuance of unsecured debt securities offset by increased share repurchases. Net debt borrowings in the nine months ended September 30, 2020 were $59.0 million compared to net debt repayments of $562.3 million in the nine months ended September 30, 2019. In the third quarter of 2020, net proceeds of $891.7 million from our issuance of $900.0 million of unsecured debt securities were partially used to repay $735.0 million of outstanding borrowings under our existing credit agreement as of June 30, 2020. In the nine months ended September 30, 2020, we repurchased a total $300.2 million of our common stock compared to $50.0 million in the nine months ended September 30, 2019.
On October 20, 2020, our Board of Directors declared the 2020 fourth quarter cash dividend of $0.625 per share. We have increased our quarterly dividend 27 times since our IPO in 1994, with the most recent increase of 13.6% from $0.55 per share to $0.625 per share effective in the first quarter of 2020. We have never reduced or suspended our dividend and have paid regular quarterly dividends to our stockholders for 61 consecutive years.
On October 23, 2018, our Board of Directors amended our share repurchase plan, increasing the total authorized number of shares available to be repurchased by 5.0 million and extending the duration of the plan through December 31, 2021. In the third quarter of 2020, we repurchased 2,466 shares at an average cost of $100.00 per share, for a total of $0.2 million, and in the nine months ended September 30, 2020, we repurchased approximately 3.3 million shares at an average cost of $90.10, for a total of $300.2 million. As of September 30, 2020, we had authorization under the plan to repurchase approximately 3.1 million shares, or about 5% of our current outstanding shares. From the inception of the plan in 1994 through September 30, 2020, we have repurchased approximately 32.5 million shares at an average cost of $47.58 per share. We expect to continue to be opportunistic in our approach to repurchasing shares of our common stock.
Liquidity
Our primary sources of liquidity are funds generated from operations, cash on hand and our $1.5 billion revolving credit facility. Our total outstanding debt at September 30, 2020 was $1.66 billion, compared to $1.60 billion at December 31, 2019. As of September 30, 2020, we had no outstanding borrowings, $37.1 million of letters of credit issued and $1.46 billion available for borrowing on the revolving credit facility. As of September 30, 2020, we had $591.6 million in cash and cash equivalents and our net debt-to-total capital ratio (net debt-to-total capital is calculated as total debt, net of cash, divided by total Reliance stockholders’ equity plus total debt, net of cash) was 17.3%, down significantly from 21.4% as of December 31, 2019.
On September 3, 2020, we entered into a $1.5 billion unsecured five-year Amended and Restated Credit Agreement (“Credit Agreement”) that amended and restated our existing $1.5 billion unsecured revolving credit facility. At September 30, 2020, borrowings under the Credit Agreement were available at variable rates based on LIBOR plus 1.25% or the bank prime rate plus 0.25% and we pay a commitment fee at an annual rate of 0.20% on the unused portion of the revolving credit facility. The applicable margins over LIBOR and base rate borrowings, along with commitment fees, are subject to adjustment every quarter based on our leverage ratio, as defined in the Credit Agreement. All borrowings under the Credit Agreement may be prepaid without penalty.
A revolving credit facility with a credit limit of $8.0 million is in place for an operation in Asia with an outstanding balance of $5.2 million and $4.3 million as of September 30, 2020 and December 31, 2019, respectively.
Capital Resources
On November 20, 2006, we entered into an indenture (the “2006 Indenture”) for the issuance of $600.0 million of unsecured debt securities. The total issuance was comprised of (a) $350.0 million aggregate principal amount of senior unsecured notes bearing interest at the rate of 6.20% per annum, which matured and were repaid on November 15, 2016 and (b) $250.0 million aggregate principal amount of senior unsecured notes bearing interest at the rate of 6.85% per annum, maturing on November 15, 2036.