Warren Buffett's Berkshire Hathaway (NYSE: BRK.B)(NYSE: BRK.A) piled into shares of Taiwan Semiconductor Manufacturing (NYSE: TSM) in 2022, buying $4.1 billion of the stock over the span of a few months. The move made sense: TSMC is the global leader in the business of manufacturing advanced chips. For customers like Apple that need hundreds of millions of cutting-edge chips each year, there is no viable alternative to TSMC right now.

Just a few months after betting billions on TSMC, Buffett turned around and sold the bulk of Berkshire's holdings. A regulatory filing in February disclosed that Berkshire's position in TSMC was reduced by about 86% in the fourth quarter of last year. Buffett's not one to make snap decisions, so this move was unusual.

Earlier this month, Berkshire disclosed that it had dumped the remaining shares of TSMC in its portfolio.

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Source Fool.com