Bullish flow in NIO with shares up 8.64%

Bullish flow in NIO (NIO), with shares up 36c, or 8.64%, near $4.46. Options volume extremely heavy with 282k contracts traded and calls leading puts for a put/call ratio of 0.13, compared to a typical level near 0.51. Implied volatility (IV30) is higher by 2.4 points near 70.35,and below the 52wk median, suggesting an expected daily move of $0.20. Put-call skew flattened, suggesting a modestly bullish tone.