Traders keep bets on first Fed rate hike in December

(Reuters) - U.S. short-term interest-rate futures contracts added to losses on Friday as Federal Reserve Chair Janet Yellen signaled the U.S central bank was on track to raise rates this year as a disappointing start to 2015 gives way to a stronger economy. The futures contracts show that traders see a 61 percent chance that the first Fed rate hike will come this December, based on CME FedWatch, which tracks rate hike expectations using its Fed funds futures contracts.