Last year's short sale ban, which restricted shorting for about
1,000 stocks, created more volatility than the financial crisis
it was implemented in reaction to, according to Abraham Lioui,
a finance professor at EDHEC Business School in Paris.
Lioui says regulators over-reached in their decision to place
a temporary ban on short selling, a move they failed to give
good reasons for and which had little, if...