Rising dollar pushes stock futures down

Stock futures are slightly lower as the dollar strengthens and investors weigh whether the Federal Reserve may raise interest rates sooner than expected. The dollar has jumped to a five-week high against the euro, pushing commodities prices lower. The gain in the dollar comes ahead of comments from Federal Reserve Chairman Ben Bernanke, who will speak before the Economic Club of Washington. As the economy improves, investors believe the Fed might start to raise rates and withdraw some of its support measures. Bond prices are higher. Overseas markets are mixed. Ahead of the market's open, Dow Jones industrial average futures are down 35 at 10,365. Standard & Poor's 500 index futures are down 3 at 1,104, while Nasdaq 100 index futures are down 6 at 1,788.