The stock market is splitting in two. Is that signaling trouble ahead, or just a new set of winners?

Tech stocks are slumping — even as more than 300 S&P 500 constituents rose Thursday — and Treasurys are rallying. Here’s what may be changing.

<p>Tech stocks are slumping — even as more than 300 S&P 500 constituents rose Thursday — and Treasurys are rallying. Here’s what may be changing.</p>