The U.S. Federal Reserve made almost $2.7 billion last quarter when gains and losses on its myriad lending facilities, asset holdings and loans to Bear Stearns and American International Group Inc. (AIG) are tallied up, according to data released Wednesday by the Fed.

The report, which includes new details on Fed lending programs including collateral quality and concentration of loans among banks, is part of the Fed's effort to provide more details on its interventions into financial markets.

The Fed aims to release the report on a monthly basis.

The report, and other steps the Fed has taken, "significantly enhances" information the Fed is releasing "and should help the public and the Congress better judge how we are carrying out our responsibilities for stabilizing the financial system and the economy," Fed Chairman Ben Bernanke said in a statement.

According to the 20-page report, the Fed had net earnings of $1.2 billion last quarter on loan programs including overnight loans to banks and investment banks, the Term Auction Facility and Money Market Mutual Fund Liquidity Facility. It earned another $2.1 billion on the Commercial Paper Funding Facility and $4.6 billion on its portfolio of assets. In contrast, it lost a combined $5.2 billion during the first quarter on its loans to Bear Stearns and AIG, as reflecting in facilities called Maiden Lane I, Maiden Lane II and Maiden Lane III.

A senior Fed official said those Maiden Lane losses are based on mark-to-market accounting, and the Fed has been advised that if it were to hold those assets to maturity, it may not actually realize any losses.

The $2.7 billion net earnings figure doesn't include outside price services and other administrative expenses.

The report also included details of the Fed's liquidity swap lines with other central banks. As of May 27, the Fed had $101 billion in liquidity swaps outstanding with the European Central Bank (down from $291 billion on Dec. 31, 2008), $9 billion with the Swiss National Bank, $25 billion with the Bank of Japan (down from $123 billion at the end of 2008) and $13 billion with the Bank of Korea.

A total of 566 depository institutions borrowed from the Fed's discount window in the four weeks ended May 27, with the majority of borrowing done by 27 large banks with assets of more than $50 billion.

Borrowers pledged $965 billion in collateral as of May 27 against $448 billion in loans.

The report doesn't list individual banks that have borrowed from the Fed, or in what amounts. The senior Fed official said the Fed is mindful of the stigma that might be associated with being named by the Fed as a borrower, which could be interpreted as a sign of weakness.

The Fed did release the names of 17 issuers of securities used to collateralize loans under the Term Asset-Backed Securities Loan Facility, which is aimed at spurring credit availability for consumers and small businesses.

-By Brian Blackstone, Dow Jones Newswires; 202-828-3397; brian.blackstone@dowjones.com