By Anne Kates Smith
From Kiplinger’s Personal Finance
A battle between the bulls and the bears is brewing on Wall Street, and the argument is not about where the stock market is headed in the next year or two but for the rest of the decade and beyond. Depending on who’s right, investors could be in for another lost decade—like the one from 2000 through 2009, when the S&P 500 index ended not far from where it began. Or investors could enjoy 10 years’ worth of decent gains, if not the to-the-moon returns we’ve seen lately.