Warren Buffett called geopolitical tensions “a consideration” in Berkshire Hathaway Inc’s (BRKa.N) decision to sell most of its stake in Taiwanese chipmaker TSMC (2330.TW) just a few months after buying it, Nikkei reported on Tuesday.

Berkshire had bought more than $4.1 billion of Taiwan Semiconductor Manufacturing Co’s shares between July and September 2022, but in February said it had sold 86% of its stake by year-end.

The size of the investment suggested that Buffett, rather than one of his Berkshire portfolio managers, had bought the shares for Berkshire, and the sale was unexpected given the billionaire’s preference to invest for the long-term.

In an interview with Nikkei, Buffett described TSMC as a well-managed company, but said Berkshire had better places to deploy capital.