The Dow rose about 140 points, while the S&P 500 is now very close of its all-time high. The Nasdaq jumped over 1%. Investors were cheering a speech by Janet Yellen in Chicago Monday morning in which she maintained the Fed will support the economy “for some time to come.” “This commitment is strong, and I believe the Fed’s policies will continue to help sustain progress in the job market,” she said. But it’s been a choppy three months. The Dow is still in the red, while the S&P 500 is up more than 1%. The Nasdaq had been the best performing major market index for most of the first quarter, but is now up only slightly after a big sell-off in momentum stocks recently.