At September 30, 2013, we had $13.7 million in cash and cash equivalents, $236.0 million available under our senior secured, revolving credit facility, and $30.7 million payable for investments purchased. Our leverage stood at 0.59 times at quarter end providing us with available debt capacity under our asset coverage requirements of $279.7 million at September 30, 2013.
Results of Operations
Results comparisons are for the three and nine months ended September 30, 2013 and 2012.
For the three and nine months ended September 30, 2013, our portfolio generated investment income of $31.4 million and $98.6 million, respectively. Of these totals, $2.4 million and $10.2 million, respectively, was fee income earned due to capital structuring, commitment and amendment fees, as well as prepayment penalties and fees earned in connection with the early repayment of certain investments. Remaining investment income, net of fees earned, was $29.0 million and $88.4 million for the respective periods, a $0.01 per share decline for the quarter from the three month average pre-fee level of $0.40 per share earned during the first half of 2013. Although there was a decline in the weighted average yields of our income producing securities over the prior quarter, it was partially offset by the $117.1 million growth in our asset base during the quarter. Our current portfolio provides us with a stable base of net investment income regardless of new investment activity and associated fee income. Fee income also tends to be relatively consistent for our business on an annual basis, although at times it may be somewhat lumpy from quarter to quarter. Fee income earned for the 2012 and 2011 annual periods has been relatively consistent at $20.7 million, or $0.28 per share, and $22.0 million, or $0.30 per share, respectively.
Total expenses for the three and nine months ended September 30, 2013 were $22.5 million and $55.6 million, respectively, versus $16.8 million and $44.0 million for the three and nine months ended September 30, 2012. Of these totals, for the three and nine months ended September 30, 2013, $5.3 million and $15.8 million, respectively, were base management fees, versus $6.0 million and $16.9 million for the three and nine months ended September 30, 2012.