Buy on the rumor; sell on the news. - Wall Street Proverb

Now free real-time stock quotes are available at several places on the web.

Google announced yesterday that its finance pages will feature real-time NASDAQ quotes. The real-time quotes are part of a pilot program offered by NASDAQ OMX Group. Real-time quotes for NASDAQ will also be offered through CNBC, The Wall Street Journal Digital Network, and Xignite.

Yahoo, Inc. launched real-time quotes for its Yahoo Finance site last week. Yahoo quotes cover both NYSE and NASDAQ stocks. However, the real-time quotes offered by Yahoo come from Electronic Communications Networks or ECN. Since ECNs do not represent the actual exchange, the real-time Yahoo quotes are not exactly real-time.