Amazon Inc. (AMZN) reported strong free cash flow FCF margins last quarter. That implies that AMZN stock could be worth between 18% and 58% more. For existing shareholders, it makes sense to hold on and short OTM puts for extra income. I discussed this strategy in my Feb. 12 Barchart article, “Shorting AMZN Puts Makes Sense Here for Existing Shareholders, Given its High Put Premiums.” At the time AMZN stock was at $173.46 and I recommended selling short the $167.50 put option expiring March 1 for $1.26 in premium. That put option expired worthless and the trade was successful as the investor m…