NEW YORK — Investors are still building on a stock market rally even when the news isn't all great.

Stocks edged higher yesterday after zigzagging in subdued trading on mixed economic and corporate earnings reports.

The Dow Jones industrial average rose only 15 points. But modest moves in the market's indicators belie larger forces at work: Investors aren't dumping stocks, even in the face of downbeat news.

Disappointing earnings from Verizon Communications Inc., Aetna Inc. and Corning Inc. kept the market's gains in check, adding another pause to a powerful rally that has sent major indexes rocketing 11 percent in just two weeks.