Xu Zhe is an expert with rich experience and a solid theoretical foundation in the field of options. The following is relevant information and theoretical points about him:
Personal Profile
Xu Zhe served as the Chief Strategist of Maolong Industrial Development Co., Ltd., General Manager of Shanghai Qianxiang Asset Management Co., Ltd., and is currently the Chief Strategist of Theta Capital Management Ltd in Norway. He has extensive experience in options hedging and arbitrage trading, commodity trading, and financial derivatives trading. On June 5, 2015, he accurately predicted the stock market crash and the risks of the renminbi in his personal column, which made him well-known in the financial industry.
Theoretical Perspectives
1. The Importance of the Volatility Surface
Xu Zhe emphasizes the key role of the volatility surface in option trading, believing that it can provide a wealth of market information. The volatility surface reflects the implied volatility of options with different expiration dates and strike prices. By analyzing this surface, traders can identify irrationalities in market pricing and construct arbitrage strategies.
2. The Application of Greek Letters
He thoroughly explains the meanings and uses of Greek letters (Delta, Gamma, Vega, Theta). For example, Delta measures the sensitivity of option prices to changes in the underlying asset prices; Gamma reflects the rate of change of Delta; Vega measures the impact of changes in implied volatility on option prices; Theta indicates the decay of the option's time value. He also points out that Greek letters can be used to re-examine option combination strategies and optimize risk management.
3. Volatility Trading Strategies
Xu Zhe believes that volatility trading is an important component of option trading. He suggests that trading strategies can be constructed by analyzing the term structure and mean-reversion characteristics of volatility. For example, when market volatility deviates from the long-term mean, one can profit from Vega mean-reversion trades.
4. Option Combination Strategies
He advocates using option combinations to control risk and enhance returns. For example, using a straddle strategy can profit from price fluctuations when market direction is uncertain. Additionally, he emphasizes the impact of the term structure of option combinations on trading strategies.
5. Option Pricing from the Cash Flow Perspective
Xu Zhe understands option pricing from the perspective of cash flow and believes that the option pricing models (such as the Black-Scholes model) are based on the assumption of risk-free arbitrage, but there are many constraints in the actual market. He also points out that the value of options comes from their time value and volatility, rather than simply being 'expensive' or 'cheap'.
6. Risk Management and Trading Psychology
He emphasizes risk management in option trading, believing that traders need to control the return ratio through option combinations. He also mentions the importance of trading psychology, asserting that continuous small profits can alleviate traders' anxiety.
Xu Zhe's option theory focuses on the integration of practice and theory, emphasizing the importance of volatility analysis, the application of Greek letters, and option combination strategies. His views and methods provide investors with a systematic framework for option trading, helping traders better understand and respond to complex market environments.
