On an early Wednesday morning, the shares of TSMC plummeted
by 6% following the news that Warren Buffett's Berkshire Hathaway had sold the
majority of its stake in the Taiwanese chipmaker's stock. The sale, which
constituted about 86% of the firm's position, was disclosed in the
fourth-quarter 13F filings the previous night.
This sudden move was unexpected, especially given that
Buffett's company usually holds onto investments for years. In fact, Berkshire
Hathaway had only revealed its $4.1 billion stake in TSMC on November 14, and
the company had already reduced its position to about $618 million in just a
few months.
Berkshire Hathaway's decision to sell its shares came after
the stock had already climbed around 18% from when it was first purchased. By
the middle of 2022, chipmakers across the board had been reducing production to
deal with oversupply issues. Despite this, TSMC seemed to have benefited from
the artificial intelligence boom that had propelled other chip-makers like
Nvidia and little-known tech companies higher. The launch of OpenAI's language
tool, ChatGPT, in November had sparked massive investor interest, and TSMC
stock had enjoyed an almost 30% rally at the start of 2023.
However, TSMC's rosy outlook took a hit last month when it
forecasted that its revenue could fall by as much as 5% in the current quarter,
and that it could face more weak demand. Nonetheless, this week, the company's
board approved a capital injection of up to $3.5 billion into its Arizona unit.
At the end of 2022, Berkshire Hathaway made several other
changes to its stock portfolio. In addition to reducing its stake in TSMC, it
also did so with US Bancorp, BNY Mellon, and Activision Blizzard. However, it
added to its position in Apple.
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