In Hong Kong, subject to the rules restrict short selling "higher than the previous price." Investors may not be less than the then best selling short selling. This rule was revoked in 1996 to 1998 between, in order to meet short-selling was emerging markets, until after the outbreak of the Asian financial crisis, then resumed implementation. Objective To develop "higher than the previous price rule" is to fall in asset prices, causing the situation to prevent short selling exacerbated the decline.