Oceanographic Development Squadron (US Navy Aviation unit designation used from 1969 to1993)美国海军中队(海洋开发单位名称用从1969年航空业to1993) Implied Volatility on the Nasdaq 100 option引申波幅在纳斯达克100个选项 VX Neutral FileVX中立的文件 NASDAQ Volatility Index纳斯达克波动的索引