NEW YORK — More signs of a weak economy gave investors a reason to sell stocks for a second day.

Stocks extended their pullback yesterday after news of a seventh straight monthly drop in industrial production overshadowed better-than-expected reports on home construction, building permits and inflation.

But analysts weren't surprised that investors were having second thoughts. "It's unreasonable to think that the market is going to go straight up and never turn back," said Eric Ross, director of research at Canaccord Adams.