The tenth anniversary of "Black Monday" is upon us. That's the day in October 1987 when the Dow Jones industrial average fell 23 percent in one day. A decade later stocks have rebounded and today the market is thriving. But the market is temperamental by nature, making the current boom either an occasion for optimism or caution. Join Ray Suarez for a look at what we can learn from "Black Monday", ten years later ....on the next Talk of the Nation, from NPR News.