New assets we acquire or originate may not generate yields as attractive as yields on our current assets, which could result in a decline in our earnings per share or stockholders' equity over time.
Assets we acquire, originate, or invest in may not generate our expected economic returns or GAAP yields, and realized cash flows may be materially lower than anticipated, including negative returns on new investments, originations, or acquisitions. To maintain portfolio size and earnings, we must reinvest a portion of the cash flows received from principal repayments, interest, and asset sales. Many of our assets generate monthly principal and interest payments, and certain MBS may be redeemed prior to maturity. In addition, we may sell assets as part of our portfolio and capital management strategies. Principal repayments, redemptions, and asset sales generate cash but also reduce the size of our existing portfolio.
If assets we acquire or invest in earn lower GAAP yields than those currently held, our reported earnings per share may decline over time as existing assets are paid down, redeemed, or sold, assuming comparable expenses. Under the effective yield method we apply to certain assets, GAAP yields are based on assumptions regarding future cash flows, and a portion of cash received may reduce the asset's basis. As a result of these factors, our GAAP accretion/amortization basis may be lower than the current fair values of these assets. Assets with a lower GAAP basis than current fair values generate higher GAAP yields, and such yields may not be available on newly acquired assets. Future economic conditions, including credit results, prepayment patterns, and interest rate trends, are difficult to project accurately over the life of the assets we acquire, and reported returns may therefore be volatile over time.
Our growth may be limited if assets are not available or not available at attractive prices.
To reinvest cash flows from payments we receive on existing investments and deploy raised capital, we may seek to originate, acquire, or invest in new assets. If asset availability is limited or pricing is unfavorable, we may be unable to originate, acquire, or invest in assets that generate attractive returns. Asset supply may decline if originations decrease or if there are fewer secondary-market sales of seasoned assets. In particular, assets we view as offering favorable risk-adjusted returns may not be available for purchase or origination.
We do not originate residential consumer loans and therefore rely on the broader origination market to supply the types of loans we seek to invest in. At times, origination volumes may decline significantly due to rising interest rates, heightened credit concerns, tighter underwriting standards, increased regulation, or concerns about economic growth or housing values. For example, during 2019 and 2020, mortgage interest rates declined and remained low through 2021, resulting in elevated industry-wide origination volumes driven largely by mortgage borrowers' refinancing activity. By contrast, from 2022 through 2023, increases in the federal funds rate led to materially higher mortgage interest rates. Although the Federal Reserve began reducing short-term benchmark rates in
September 2024, long-term mortgage rates remained elevated. If long-term interest rates remain elevated or increase, refinance and purchase origination volumes are likely to decline and may not return to prior levels, making it more difficult for us to acquire loans and securities. Similar conditions could also reduce origination volumes at our residential investor loan platform, limiting assets available for transfer to our investment portfolio, sale, or securitization.
We originate residential investor loans, but we may be unwilling to offer loan proceeds or interest rates that borrowers find acceptable or that are competitive, which could reduce loan origination volumes. In addition, the supply of newly issued RMBS collateralized by residential consumer mortgage loans may decline if securitization economics are unfavorable or if regulatory requirements discourage or limit participation in securitization markets. Further, a lack of demand for triple-A rated securities could significantly reduce the availability of subordinate real estate securities.
We have entered into credit risk-sharing arrangements with Fannie Mae and Freddie Mac and invested in credit risk transfer securities under which we are compensated for assuming credit losses on new conforming loans or participating in similar risk-sharing or transfer structures. We may continue to make such credit-related investments and may pursue recent initiatives to grow our mortgage banking businesses and increase loan origination and acquisition volumes. Although these initiatives present potential opportunities for capital deployment, they may not generate meaningful or attractive investment opportunities due to competition from other investors, regulatory constraints, or federal housing finance reform initiatives affecting Fannie Mae and Freddie Mac.
Investments in diverse types of assets and businesses could expose us to new, different, or increased risks.
We have invested, and may continue to invest, in a range of real estate and non-real-estate assets that differ from our traditional investments or may be riskier, for example, assets in subordinate lien positions. We may also engage in securitizations, transactions, joint ventures, services, investment fund management, and other operating businesses that differ from those we have historically pursued. For example, in recent years we expanded our mortgage loan purchases to include residential investor bridge loans and residential investor term loans. Since 2019, we have acquired three residential investor loan origination platforms, CoreVest (2019), 5 Arches (2019), and Riverbend (2022), which we combined into a single platform for originating residential investor loans. These acquisitions have increased our holdings of residential investor whole loans and our issuance and ownership of securities backed by such loans under the CAFL securitization label. We have also made, and may continue to make, strategic investments in internal or third-party residential consumer and residential investor mortgage origination platforms and through our RWT Horizons venture investing initiative. In addition, in recent years we have invested in subordinate securities backed by re-performing and non-performing residential loans, multifamily securities, HEI and HEI-backed securities, excess MSR investments, servicer advance investments related to residential mortgage loans, and a multifamily fund focused on workforce housing. We have also pursued, and may continue to pursue, joint ventures or investment vehicles with third-party investors to acquire loans, HEI, or other assets and to earn related fees, incentives, or other income.
Any of these actions may expose us to new, different, or heightened investment, operational, financial, regulatory, or management risks. Many of these investments are complex and highly structured and involve partnerships or joint ventures with co-investors or co-sponsors, which may limit liquidity. In addition, for transactions with novel or complex structures, the associated risks may not be fully understood by market participants.
As discussed further in these Risk Factors, originating and investing in HEI presents new business, operational, and regulatory risk, including the risk that HEI may be recharacterized or regulated as mortgage loans by courts, legislation, or regulatory agencies. Financing for such non-traditional investments may be limited or costly, reducing liquidity and investable capital. If our assumptions regarding property values or appreciation are incorrect, returns may decline, and if property values fall or our ability to enforce HEI terms is constrained, we may incur losses, including a total loss of our investment. Investments in HEI, or residential consumer, residential investor loans, or other assets secured by subordinate/junior liens, or in securities backed by such assets, also involve risks that are greater than, or not present in, senior-lien products, including increased loss severity due to the subordinate lien position, and risk of loss related to home price appreciation (or depreciation). Our assumptions may prove incorrect, market conditions may change, or we may be exposed to higher-than-expected rates of delinquency, default, foreclosure, or litigation, any of which could have a negative impact on our financial or operational results related to these acquisitions and to our business as a whole
As another example, one of our excess MSR investments includes a related investment in servicer advances financed with non-recourse debt. Although non-recourse financing generally limits losses to the value of the collateral, a default could result in a complete loss of our servicer advance investment and the associated excess MSRs. In addition, when this financing matures, we may be unable to renew it on favorable terms, or at all, which could adversely affect the value of our investment. Additional discussion of these risks is included in Part II, Item 7 of this Annual Report.
As another example, in connection with our acquisitions of CoreVest, 5 Arches, and Riverbend, we made assumptions regarding the cash flows and investments expected to be generated from these businesses. In addition, originating and investing in residential investor mortgage loans exposes us to risks different from those associated with our traditional residential mortgage banking activities, including higher potential rates of delinquency, default, foreclosure, and litigation.
We may invest in non-real-estate asset-backed securities (ABS), corporate debt, or equity, including various types of IO securities from residential consumer, residential investor, and multifamily securitizations sponsored by us or others. These investments may involve higher credit and prepayment risks, increasing our potential exposure to losses. We may also invest in non-U.S. assets, which may expose us to currency risk (which we may choose not to hedge) and differing credit, prepayment, hedging, interest rate, liquidity, legal, and other risks. In addition, our RWT Horizons venture investing platform focuses primarily on early-stage businesses in the real estate, lending, and financial technology sectors. These investments may take various forms, including convertible debt or equity, and involve unique risks, including the risk of a total loss of the amount invested. We have experienced losses on certain of these investments and may incur losses in the future. Such investments may expose us to new or heightened risks that we did not anticipate, which could adversely affect financial returns. Further, investments in certain assets or businesses may create a risk that the income or activities associated with those investments could cause us to fail to satisfy the requirements to maintain our REIT status or our exemption from registration under the Investment Company Act, as further discussed in these Risk Factors.
Our capital strategy includes pursuing joint ventures and investment vehicles or funds with third-party investors to acquire loans, HEIs, or other assets originated by our operating platforms or sourced through our mortgage banking and investment activities, and, where applicable, to earn related fees, incentives, or other income. These initiatives may expose us to risks different from those associated with our traditional mortgage banking activities and may not be successful, including any efforts to engage in providing investment advisory services. In addition, such initiatives may require us to register as an investment adviser with federal or state regulators, resulting in increased regulatory compliance costs and related risks.
We may change our investment strategy or financing plans, which may result in riskier investments and diminished returns.
We may change our investment strategy or financing plans at any time, which could result in investments that differ from, and may be riskier than, those we have previously made or described. Changes in strategy or financing may increase our exposure to interest rate risk, default risk, and real estate market volatility. Decisions to increase leverage could amplify these risks, while decisions to reduce leverage could lower investment returns. In addition, certain recent investment activity involves financing incurred by joint venture entities we do not control, which is not reflected on our balance sheet. Changes in our strategy may also result in investments in new asset classes or different allocations among asset categories. For example, we have expanded our mortgage banking and investment activities through initiatives such as acquiring and originating residential investor term and bridge loans, completing the acquisitions of CoreVest, 5 Arches, and Riverbend, and optimizing portfolio size and target returns. We have also made, and may continue to make, strategic investments in residential consumer and residential investor mortgage origination platforms, our RWT Horizons venture investing initiative, subordinate and non-performing loan-backed securities, multifamily securities, HEI and HEI-backed assets, excess MSR and servicer advance investments, and multifamily loan and property investment funds. In addition, since 2023, we have formed joint ventures with large institutional investors to purchase loans we originate, and we may continue to pursue similar joint ventures, investment vehicles, or funds with third-party investors to acquire loans, HEI, or other assets from us or other sources and to earn related fees, incentives, or other income. These initiatives may target investments with different return profiles or employ leverage differently than in the past. We may also determine to increase our exposure to securities backed by non-prime or subprime residential mortgage loans or assets secured by junior liens, which could increase investment risk and adversely affect returns. Conversely, we may adopt more conservative investment or financing strategies that reduce risk but also lower returns, which could also adversely affect our financial performance.