Did anyone notice that the weeklys for aapl, amzn, fb , tsla and etc... became all crazy. The ask is way high, the delta is very low, an the spread also got wider. Any explanation?
MM's expand the bid/ask when the stock is trending. If you see and extreme delta change, it might be your platform. That's an internal calc.
aapl, amzn, fb, those have earnings this week --whenever there's a pending corporate event, IV goes up and is kept higher, which keeps the premium higher, til the event takes place. Tesla made a big move from 195 to 219 in past 3 days, so my guess is that's what's causing it to keep the higher IV. Also, like xandman said, spreads get wider when trending.