James Mountain
Analyst · Ladenburg Thalmann
Thank you, Keith, and thanks to all of you for joining us this morning to discuss ARMOUR's third quarter 2021 results. Today, I'm joined by ARMOUR's co-CEOs, Scott Ulm and Jeff Zimmer; and our CIO, Mark Gruber. By now, everyone has access to ARMOUR's earnings release, which can be found on ARMOUR's website, www.armourreit.com.
This conference call may contain statements that are not recitations of historical fact and, therefore, constitute forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. All such forward-looking statements are intended to be subject to the safe harbor protections provided by the Reform Act. Actual outcomes and results could differ materially from the outcomes and results expressed or implied by these forward-looking statements due to the impact of many factors beyond the control of ARMOUR.
Certain factors that could cause actual results to differ materially from those contained in forward-looking statements are included in the Risk Factors section of ARMOUR's periodic reports, which are filed with the Securities and Exchange Commission. Copies are available on the SEC's website at www.sec.gov. All forward-looking statements made in this conference call are made as of today's date only. They are subject to change without notice. We disclaim any obligation to update our forward-looking statements unless we're required to do so by law.
Also, our discussion today may include references to certain non-GAAP measures. A reconciliation of these measures to our most comparable GAAP measures are included in our earnings release, which can be found on ARMOUR's website. An online replay of today's conference call will be available on ARMOUR's website shortly and will continue for 1 year.
ARMOUR continues to concentrate its portfolio activity in agency MBS for the foreseeable future. Quarter-end book value was $11.09 per common share, down $0.19 from the end of Q2 2021. This quarter-over-quarter decrease reflects spread widening across our MBS portfolio, which is likely the result of concerns over the increasingly imminent Fed taper and the ultimate direction of several stimulus and debt ceiling bills that continue to consume most of the Congressional calendar.
While spread widening negatively impacts the current market value of our existing MBS portfolio, it also often represents improving opportunities for new MBS investments. At September 30, ARMOUR's portfolio consisted of $4.3 billion of agency securities plus TBA positions representing another $4.2 billion.
At the close of business this past Tuesday, we estimated book value to be approximately $10.97 per common share. Liquidity, including cash and unencumbered securities, was nearly $900 million, representing almost 78% of our total equity. ARMOUR's Q3 comprehensive income was $13.3 million, which includes $34 million of GAAP net income. Distributable earnings, which excludes gains or losses from security sales and early termination of derivatives as well as market value adjustments but includes TBA drop income, was $24.7 million or $0.25 per common share. You may have noticed that we changed the name of this non-GAAP measure from the prior name we used of core income. We think this better reflects the way we think about this statistic.
During the quarter, ARMOUR issued 4,550,825 shares of common stock through our ATM program, raising $49.1 million of capital after fees and expenses. For the first 3 quarters, our capital raising efforts have added about $0.03 to book value per common share. In addition to considering whether these offerings are accretive or dilutive on the margin, we also look at their potential for per share cost savings from spreading administrative costs over a larger share base.
ACM, the company's external manager continued to waive a portion of its management fee. That waiver was initiated in the second quarter of 2020. This waiver offset $2.1 million of operating expenses for the third quarter of 2021. For Q4 2021, we expect the management fee waiver to total $2 million. ARMOUR paid dividends of $0.10 per common share for each month in the third quarter for a total of $28.5 million. We've also declared October and November common dividends at that $0.10 rate per share as well as the Preferred C Stock dividends for Q4 2021 at the rate of $0.14583 per share.
Now let me turn the call over to co-Chief Executive, Scott Ulm, to further discuss ARMOUR's portfolio position and current strategy. Scott?