US stocks extend records ahead of Yellen testimony

Wall Street stocks rose early Monday, extending last week's records on continued positive momentum ahead of congressional testimony this week by US Federal Reserve Chair Janet Yellen. The broad-based S&P 500 gained 0.4 percent to 2,325.41, while the tech-rich Nasdaq Composite Index advanced 0.5 percent to 5,761.77. Last week's records were spurred by statements from President Donald Trump that he will release details of a tax-cut plan within two to three weeks, reassuring the market after th