DraftKings Inc (DKNG) said in its latest earnings release on Feb. 15 that it expects to make between $310 and $410 million in free cash flow (FCF) this year. DKNG stock’s value could be worth at least 50% more if it occurs. The reason is simple. This is completely unexpected and if it occurs it means that the company’s FCF will be close to 8% of its revenue. That is because analysts forecast revenue of $4.71 billion this year. So the midpoint estimate from the company of $360 million is equal to 7.64% of $4.71 billion. Moreover, if the upper end of $410 million in FCF occurs, that implies a FC…