The main benchmarks erased some if not all of their early morning gains, putting the lid on a tough month and quarter. Stocks jumped at the open as an encouraging reading on inflation sent Treasury yields lower. The main benchmarks lost steam as the session wore on, however, as brinkmanship in Washington D.C. has the U.S. government all but likely to shut down over the weekend. Ahead of the opening bell, the Bureau of Economic Analysis said its August personal consumption and expenditures (PCE)