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For Alibaba, the chart below (click on the chart to view a larger and more legible version) shows that the potential annualized return of +18.4% for this Covered Calls position is preferable to the +16.8% to establish a comparable 100% Cash-Secured Puts position.
The implied volatility of the Call options was 30.3 when this position was established and the open interest was 20,811 contracts
The downside 'breakeven price' at expiration is at $157.90 ($169.05 - $11.15), which is 6.6% below the current market price of $169.05.
Using the Black-Scholes Options Pricing Model, the probability of making a profit (if held until the October 20th, 2017 options expiration) for this position is 76.1%. This compares with a probability of profit of 50.2% for a buy-and-hold of this Alibaba stock over the same time period. Using this probability of profit of 76.1%, the expected value for the annualized return-on-investment (if held until expiration) is +14.0% (+18.4% maximum potential annualized return on investment * 76.1%), an attractive risk/reward profile for this conservative investment.
Finally, the 'crossover price' at expiration is $180.20 ($169.05 + $11.15). This is the price above which it would have been more profitable to simply buy-and-hold Alibaba stock until the Oct. 20th options expiration date rather than establishing this Covered Calls position.