Technology companies led a broad rally for stocks, giving the S&P 500 its best gain since early August, the AP reports. Traders were encouraged Tuesday by a gain in China's main stock index after the country took more steps to soften the financial blow of the recent virus outbreak. Bond prices fell, sending yields sharply higher, in another sign investors are willing to take on more risk. Tesla's stock soared again. The S&P 500 rose 48 points, or 1.5%, to 3,297. The Dow Jones Industrial Average jumped 407 points, or 1.4%, to 28,807 and the Nasdaq added 194 points, or 2.1%, to 9,467, reaching another all-time high. (More stock market stories.)