Another thread. He was calling a MMer on here "inexperienced" and then he (Stardust) went on to ask about frequency of delta hedging (hourly?). wtf.
Yes, and there goes your parity... The fact that put/call parity for American options is formulated as an inequality, rather than an equality, is very well known.
And it's an easy out for the holder for the reversal and massively beyond the scope of a thread that asks about how they're related (put and call at strike). It's a rates trade and all trades involve risk. The primary application of the trade (rates bet) tells us so (parity violation).
I don't recall seeing any such questions, sorry... I have no idea what edge there might be in something like this. I didn't mean to derail, sorry...