U.S. indices are down in premarket trading as Wall Street’s record-breaking rally appeared to lose some steam despite strong quarterly performances from high-profile companies

U.S. stock indexes barely budged after a quiet day of mixed trading on Tuesday. The S&P 500 edged down by less than 0.1%. It was a tiny loss, but it still marked the first back-to-back drop for the index in a month and a half.

Stocks have been on a terrific run over the past decade. But the years ahead might not be quite so spectacular. A rising chorus of market watchers has recently sounded the alarm about the possibility