system
A chat on subreddit /r/wallstreetbets
human
Kid:

Zero days to expiration options, or 0DTE options for short, are options contracts that expire and become void the same day that they're traded. When an option reaches this stage, there's not much more time left to act on the right to buy or sell the underlying asset.
gpt
"*..and is generally purchased by highly regarded individuals.*" Ftfy