Ark Invest's Cathie Wood doubled down on the artificial intelligence boom, purchasing shares of multiple Magnificent 7 and Chinese AI stocks in Q3 despite Wall Street concerns over an AI bubble, as megacap tech valuations remain stretched.Contrarian Bets in Disruptive TechnologyWood is known for her contrarian approach, investing heavily in disruptive technologies. In Q3, she made notable purchases in the so-called Mag 7 — the largest US tech stocks — and Chinese AI firms. Meanwhile, some hedge fund manager ...