NEW YORK, Feb 18 (Reuters) - Late arrivals to the speediest rally in stocks since the Great Depression pushed stocks higher for a third week on Friday, ignoring growing signals of an overheating market.
Weak volume, a possible signal of a tired run, is being watched closely by market participants. About 7.13 billion shares traded on the New York Stock Exchange, NYSE Amex and Nasdaq, below last year's estimated daily average of 8.47 billion.
The Dow Jones industrial average was up 73.11 points, or 0.59 percent, at 12,391.25. The Standard & Poor's 500 Index was up 2.58 points, or 0.19 percent, at 1,343.01. The Nasdaq Composite Index was up 2.37 points, or 0.08 percent, at 2,833.95.