COLUMN-Four reasons why boomerang effect will prolong stock rally

CHICAGO, April 1 (Reuters) - This is no April Fool's day joke, but catastrophes are good for stocks - eventually. The market usually boomerangs into massive rallies in the wake of them. That's what seems to be happening now, which sustains the argument for a continued rally after the S&P 500 index and the Dow Jones Industrial Average hit new highs last week.