Lumentum Is the S&P 500’s Top Performer Today. Here’s Why.

Lumentum Holdings was among the hottest names in the artificial-intelligence trade at the start of the year. After a couple rocky months, it is time to buy, according to Barclays. The firm upgraded Lumentum shares to Overweight from Equal Weight and reiterated a price target of $1,000 in a research note Monday.