By Dan Weil Republicans appear set to gain a small majority in the House, and control of the Senate is still up for grabs. After the Nov. 8 elections, it looks like Republicans will have a narrow majority in the House, and the Senate is a toss-up. So what does that mean for financial markets? Nothing. That’s not completely true. With their majority in the House, Republicans can force a government-debt default or a government shutdown, which would be disastrous for markets. But hopefully, cooler heads will prevail among the GOP. In any case, aside from wildcards like this, the direction of fina…