湘财证券晨会纪要-20250828

Financial Engineering - The volatility skew strategy involves arbitrage trading based on the implied volatility differences between in-the-money and out-of-the-money options. The VSI indicator is used to describe these differences, calculated as the ratio of the implied volatility of an out-of-the-money option to that of an in-the-money option. Under normal conditions, the VSI indicator fluctuates within a certain range, but significant differences in volatility ratios indicate potential arbitrage opportunities [2][3]. - The strategy's performance is closely correlated with current volatility levels. Position control signals are established based on the volatility level. If the current volatility is high and the option combination has negative volatility risk exposure, it is favorable to trade with full positions. Conversely, if the exposure is positive, only half the position should be used [4][5]. Strategy Performance - From February 2015 to August 2025, the annualized return for the call strategy was 17.43% with a maximum drawdown of 13.83%, and a Sharpe ratio of 1.85. The put strategy had an annualized return of 17.47% with a maximum drawdown of 10.64% and a Sharpe ratio of 2.50. The combined strategy achieved an annualized return of 17.65%, a maximum drawdown of 7.52%, and a Sharpe ratio of 2.98 [5]. - In the current year, the call strategy yielded a return of 4.52% with a maximum drawdown of 2.93%, while the put strategy experienced a return of -4.16% with a maximum drawdown of 10.49%. The combined strategy returned 0.26% with a maximum drawdown of 5.57% [5]. - Over the past two weeks (August 11 to August 22, 2025), the call strategy returned 0.60% with a maximum drawdown of 0.32%, while the put strategy returned -0.17% with a maximum drawdown of 0.49%. The combined strategy returned 0.22% with a maximum drawdown of 0.34% [5]. Trading Signals - As of August 22, 2025, the call strategy triggered two opening signals in the past two weeks, with the latest position being empty. The put strategy did not trigger any opening signals and remained empty. The volatility signal was negative, indicating that the implied volatility level was higher than the historical volatility [6].