Narrow market gains and weak sentiment point to rising stock risks

Major US stock indexes have risen, but only 42% of S&P 500 stocks are above their average price over the past 200 trading days.

The long-term average is about 55%, so fewer stocks are helping drive the market up.

That concentration could make the market more vulnerable to a fall.

The article says risks are increasing, but it may be too early for investors to exit.