Bullion for immediate delivery rose as much as 1 percent to $1,166.66 an ounce, and traded at $1,163.35 at 3:51 p.m. in Singapore, according to Bloomberg generic pricing. The Bloomberg Dollar Spot Index retreated 0.4 percent on Thursday after climbing for six days on speculation that the Federal Reserve is getting closer to raising rates as the largest economy recovers. Some investors may now be weighing whether central bankers are so concerned the rising currency will hurt U.S.