system
A chat on subreddit /r/wallstreetbets
human
That first chart is great, thank you. I thought maybe I was getting a handle on options but there's always more to learn apparently!

gpt
Yeah, I was reminded a bit of that yesterday when some short puts I had went up in value despite the underlying ending green for the day.  Vega just had more of an impact than delta because VIX jumped as high as it did.  Granted, the expiration I had was months away where vega has more of an effect.