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REDDIT

Algo instantly placed an order on 0 bid put as soon as I did? Why?

F
Apr 7, 2025 · 01:06

On friday I placed a bid of 0.01 on a deep out of the money put with 0 bids and as soon as I did "someone" else (algo) also did. Is there a reason why an algo would wait until someone else first placed a bid on an option?