S&P 500 Rallies With Bonds on Fed Bets Whille Oil Slumps

Stocks rallied with Treasuries, giving the Standard & Poor’s 500 Index its biggest gain of the year, as Federal Reserve concerns over a global slowdown spurred bets interest rates will remain low. Gold rose, the dollar erased gains while Brent crude slid into a bear market.

The S&P 500 jumped 1.7 percent at 4 p.m. in New York, the most since Oct. 10, 2013. The Nasdaq 100 Index also had its best performance in a year, soaring 2.1 percent. The yield on 10-year Treasuries dropped 2 basis points to 2.32 percent, wiping out an earlier advance. The Bloomberg Dollar Spot Index lost 0.5 percent, erasing a gain of 0.3 percent. Spot gold jumped 1.1 percent. Brent crude closed 21 percent below a June peak, the common definition of a bear market.