haircut:
A deduction in the market value of securities being held by brokerage and investment banking firms as part of net worth for calculating their net capital. The size of a haircut varies with the particular type of security held.
昨天我看到tangba剪头帖子，已经来不及出了。A股如果不是T+1,昨天死活得逃。只有今天开场就逃了。