It's common for investors to be interested in the companies Warren Buffett buys and sells for the Berkshire Hathaway (NYSE: BRK.A) (NYSE: BRK.B) stock portfolio. After all, Buffett is one of the greatest investors of all time. It makes sense that investors would want to know what moves he's making.

While Buffett's Berkshire portfolio may be of interest, simply mimicking his trades should not be an investment strategy. He has a significantly different portfolio than most investors, so unless he publicly comments on a trade decision, investors will never know the exact reasons for a buy or sell. 

In 2020, Buffett sold out of his entire Costco Wholesale (NASDAQ: COST) position. Whatever his reasons were at the time, I think Costco is a company investors should own in 2023. Who knows? Maybe Buffett would agree.

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Source Fool.com