Wall Street cheers "cliff" deal, but only for now

The stock market dropped sharply in the weeks after the election Nov. 6 as investors worried that a divided government wouldn't get a deal done in time to meet a budget deadline by the end of the year, but it has rebounded since then. The S&P 500 is now 2 percent higher than it was on election day, even after falling by as much as 5 percent in the two weeks following the vote. On Friday it closed at 1,466, the highest since December 2007.

"When push came to shove, Congress did come together to reach an agreement," says Tanious. "Many people were saying you should be out of the market ... (that) markets are going to capitulate, and that didn't happen."

Stocks have rallied over the last three years as investors remain optimistic that the economy will maintain a slow, but steady, recovery from recession, as the housing market improves and as the outlook for jobs gets better.

And while investors also see the wisdom in addressing the nation's long-term debt problems, they point out that businesses and consumers have been aggressively paying down their own debts in the aftermath of the 2008 financial crisis. That leaves more flexibility for people and companies to shop, invest, and spend money, helping to lift the economy — and the stock market — even if Washington's political dysfunction worsens.