To the extent we raise additional equity capital through follow-on equity offerings or under our dividend reinvestment and direct stock purchase plan, we may use cash proceeds from such transactions to purchase additional investment securities, to make scheduled payments of principal and interest on our funding liabilities and for other general corporate purposes. There can be no assurance, however, that we will be able to raise additional equity capital at any particular time or on any particular terms. Furthermore, when the trading price of our common stock is significantly less than our estimate of our current tangible net asset value per common share, among other conditions, we may repurchase shares of our common stock, subject to the provisions of our stock repurchase program (see Note 9 to our Consolidated Financial Statements in this Form 10-K).
OFF-BALANCE SHEET ARRANGEMENTS
As of December 31, 2016, we did not maintain any relationships with unconsolidated entities or financial partnerships, such as entities often referred to as structured finance, or special purpose or variable interest entities, established for the purpose of facilitating off-balance sheet arrangements or other contractually narrow or limited purposes. Furthermore, as of December 31, 2016, we had not guaranteed any obligations of unconsolidated entities or entered into any commitment or intent to provide funding to any such entities.
AGGREGATE CONTRACTUAL OBLIGATIONS
The following table summarizes the effect on our liquidity and cash flows from contractual obligations for repurchase agreements, FHLB advances and related interest expense (in millions):
Repurchase agreements and FHLB advances
Interest expense 1
Interest expense is calculated based on the weighted average interest rates on our repurchase agreements and FHLB advances as of December 31, 2016.
All statements contained herein that are not historical facts including, but not limited to, statements regarding anticipated activity are forward looking in nature and involve a number of risks and uncertainties. Actual results may differ materially. Among the factors that could cause actual results to differ materially are the following: (i) changes in the market value of our assets; (ii) changes in net interest rate spreads; (iii) changes in prepayment rates of the mortgage loans underlying our Agency securities; (iv) risks associated with our hedging activities; (v) availability and terms of financing arrangements; (vi) further actions by the U.S. government to stabilize the economy; (vii) changes in our business or investment strategy; (viii) legislative and regulatory changes (including changes to laws governing the taxation of REITs); (ix) our ability to meet the requirements of a REIT (including income and asset requirements); and (x) our ability to remain exempt from registration under the Investment Company Act of 1940. For a discussion of the risks and uncertainties which could cause actual results to differ from those contained in the forward-looking statements, please see the information under the caption "Risk Factors" described in this Annual Report on Form 10-K. We caution readers not to place undue reliance on any such forward-looking statements, which statements are made pursuant to the Private Securities Litigation Reform Act of 1995 and, as such, speak only as of the date made.