Bullish option flow detected in Riot Blockchain with 60,982 calls trading, 1.5x expected, and implied vol increasing almost 7 points to 104.41%. Feb-25 12 calls and 1/3 weekly 10 puts are the most active options, with total volume in those strikes near 34,900 contracts. The Put/Call Ratio is 0.24. Earnings are expected on February 20th.