The artificial intelligence trade, which has powered by the lion’s share of stock performance and corporate profit growth this year, hit a snag on Wednesday amid reports that Meta Platforms is ready to challenge the market’s key players just as investors worry that cheaper China-based versions could unsettle the market’s hottest bet over the back half of the year. “The Magnificent Seven aren’t broken, they are evolving,” said Jay Woods, chief market strategist at Freedom Capital Markets.