A few hundred Wall Streeters met in the Cayman Islands last week as the market was melting down. No one could stop talking about the newest feature in global markets: fear of the unknown. The market is morphing into a more volatile creature. Some investors will get it, and some will be winnowed out. Last week, a few hundred terrified Wall Streeters met in paradise as the market weighed (and howled at) the prospect of a swiftly changing global economy. "The world has not ended. The market will be back.