Volatility-selling strategies carry potential systemic cost
投资者越来越多采用卖出隐含波动率、待其回落至与已实现波动率一致时再买回的波动率卖出策略，但这类策略可能产生系统性成本。
Investors have increasingly turned to stock market volatility-selling strategies based on the idea of selling implied volatility and buying it back later when it falls to a level more consistent with realized volatility.