Warren Buffett’s Berkshire Hathaway Inc. may be on the cusp of getting Federal Reserve oversight under a proposal by regulators that also increases the chances that American International Group Inc.(AIG) and MetLife Inc. will receive heightened scrutiny, Bloomberg reported.

Berkshire had $29.7 billion in credit-default swaps linked to its debt as of Oct. 28, putting it just under a $30 billion threshold proposed last month by the Financial Stability Oversight Council. AIG, in which U.S. taxpayers now have a majority ownership stake, had $45.3 billion in swaps written against it, and MetLife, the New York-based insurer, had $32.9 billion, Bloomberg said.

The council, responsible for deciding which non-bank financial firms are systemically important and require Fed oversight, plans to evaluate those that have $50 billion or more in assets and meet any one of five other criteria, including the credit-default swap threshold. Berkshire, AIG and MetLife all meet the asset minimum, Bloomberg said.

The swaps measurement is “forward-looking” and shows that “the market thinks you are big enough to bet on,” said Karen Shaw Petrou, managing partner of  Federal Financial Analytics Inc., a bank consulting firm. “It also gives the regulators external, market-driven information about perceptions of credit risk.”

AIG received a taxpayer bailout in 2008 that was designed in part to protect banks that bought $62.1 billion in swaps from the firm. The market value of the securities tied to the derivatives collapsed, spurring collateral calls that drained AIG of cash.