Berkshire Hathaway Inc (NYSE:BRK) (NYSE:BRK) has silently emerged as one of the biggest players in the U.S. Treasury-bill market. In JPMorgan‘s estimation, Warren Buffett‘s conglomerate currently holds around 5% of all outstanding short-term government bills. This makes it the fourth-largest holder in the world.

What Happened: Berkshire’s T-bill holdings have increased to $314 billion as of the end of March, multiplying twofold in the past year, outpacing even the holdings of foreign banks, the Federal Reserve, Local Government Investment Pools, offshore money market funds, and stablecoin-backed reserves, according to JPMorgan, reported CNBC.

Buffett regularly buys T-bills at weekly auctions, at times in $10 billion chunks. With short-term …

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