By Ellen Chang The stock market could be poised for policy indecisions from both the House and Senate. Wall Street investors prefer gridlock in the House and Senate as the U.S. midterm elections are still undecided with a potential run-off in Georgia. The races in Georgia, Nevada, and Arizona will determine which party controls the Senate and House as there appears to be no obvious winner. Expect to wait — the party that controls the House could be announced in several days, while news about the Senate could take as long as a month. But Wall Street is ready to move on. “Gridlock is good for t…