Tesla's electric vehicle sales are shrinking, but Cathie Wood and Ark Invest say there's a different reason to buy the stock.

Cathie Wood-led Ark Invest made significant trades, with Advanced Micro Devices Inc (AMD) and Palantir Technologies Inc (PLTR) being the most prominent.

Investors can own a slice of top artificial intelligence companies like Tesla, Nvidia, and Alphabet with this Ark Invest exchange-traded fund.

For many investors, Zoom Video Communications ( ZM 0.93%) is a pandemic trade that has long since lost its allure. But Cathie Wood's Ark Invest published a valuation model in 2022 estimating Zoom would reach $1,500 per share by 2026. From the current share price of $67, that forecast implies 2,138% upside in little more than two years.

Cathie Wood, chief of Ark Investment Management, frequently adjusts her top positions, adding to a holding when the stock falls and selling when it rises. Last week she did some notable buying. This week she was selling,