Bullish option flow detected in NIO with 28,106 calls trading, 1.5x expected, and implied vol increasing over 2 points to 83.94%. 5/10 weekly 6 calls and 5/10 weekly 5.5 puts are the most active options, with total volume in those strikes near 11,100 contracts. The Put/Call Ratio is 0.47. Earnings are expected on June 6th.