I don't think much will happen. The authorities will be keeping a close watch on the market activities.
"The Commission's emergency order that prohibits persons from selling short the securities of financial institutions will expire at 11.59pm (eastern time) on Wednesday, October 8, 2008," the statement said.
http://news.theage.com.au/business/us-set-to-lift-shortselling-ban-20081004-4toz.html
WHAT WILL HAPPEN AFTER LIFTING SHORT SELLING????