The Federal Home Loan Bank System, Explained: How Banks Borrow in a Pinch

Most bank customers have never heard of the Federal Home Loan Bank System, yet it is one of the largest sources of wholesale funding for U.S. banks, thrifts, credit unions, and insurance companies. Created by Congress in 1932 to support home finance during the Depression, the system today functions as a cooperative lender that helps its member institutions manage liquidity and fund mortgage lending. Understanding how it works helps explain where banks get cash when deposits run low, and why FHLB borrowing data is watched closely by analysts and regulators.

What the FHLB System Is

The system consists of 11 regional Federal Home Loan Banks, each a separate corporation owned by its member financial institutions within a defined geographic district. The 11 FHLBanks are themselves government-sponsored enterprises, overseen by the Federal Housing Finance Agency (FHFA), the same regulator that supervises Fannie Mae and Freddie Mac. Unlike Fannie and Freddie, however, the FHLBanks did not go into conservatorship during the 2008 financial crisis and have continued operating as member-owned cooperatives ever since.

To join, a bank, thrift, credit union, or insurance company buys stock in its district FHLBank, which gives it access to borrow. Membership is voluntary but widespread: according to the FHFA, several thousand U.S. depository institutions and insurers are FHLBank members, spanning community banks to the largest national lenders.

How Advances Work

The core product is the 'advance,' a loan from an FHLBank to a member institution. Advances are fully collateralized, meaning the borrowing institution must pledge eligible assets worth more than the loan amount. This over-collateralization is a key reason FHLBank debt has historically carried very low credit risk.

• Eligible collateral typically includes residential mortgages, mortgage-backed securities, U.S. Treasury and agency securities, and in some cases commercial real estate loans or small-business loans.
• Advances can be short-term (overnight) or long-term (up to 20 years or more), giving members flexibility to match funding to their asset mix.
• Because FHLBanks raise money in global capital markets at rates close to Treasury yields, advances are often cheaper than other wholesale funding sources, such as brokered deposits or fed funds borrowing.
• Member institutions must hold FHLBank stock proportional to their borrowing, which is redeemed as advances are repaid.

Why the System Matters for Bank Health

FHLB advances are a normal, routine part of bank liquidity management — not inherently a red flag. Many healthy banks use advances to fund mortgage originations or smooth out seasonal deposit swings. But because advances are quick to obtain and heavily collateralized, they are also often a bank's first call for emergency liquidity when deposits are leaving faster than expected, earning the system a reputation in banking circles as a 'lender of next-to-last resort,' a step before a bank turns to the Federal Reserve's discount window.

That pattern drew scrutiny after the 2023 regional bank stress episode. Post-failure reviews published by federal banking regulators, including the Federal Reserve's own report on the supervision and failure of Silicon Valley Bank, noted that some troubled institutions sharply increased their FHLBank borrowing in the weeks before they failed, using it to replace fleeing deposits. Because FHLBank advances are senior and fully secured, heavy reliance on them can also reduce the collateral available to the FDIC in a resolution, a dynamic regulators and researchers have continued to study.

What It Means for Depositors and Investors

Retail bank customers do not have accounts with FHLBanks and are not directly exposed to them. The relevance is indirect: FHLBank advances help keep mortgage credit flowing and give banks a stable funding option, which supports overall banking system resilience. For investors who follow bank stocks, a bank's FHLBank borrowing level, disclosed in quarterly call reports and SEC filings, can be one input among many for assessing liquidity risk — though a rising balance alone does not prove a bank is in trouble.

Where to Check the Numbers

The FHFA publishes annual reports on the FHLBank System's financial condition and membership, and each FHLBank discloses its own financial statements. Individual member banks report their FHLBank advances in quarterly Call Reports filed with federal regulators and, for public companies, in SEC filings such as the 10-Q and 10-K.