Everyone at the buffet table has their own limit on how much they can eatQuote from trefoil:
Well, I figure if you're in a stock you should be able to tolerate 10% down on an earnings day, assuming a reasonably diversified portfolio, especially if you're in a tech stock. Even if it makes up 10% of your holdings (which is a lot, usually), 10% down would then only be a 1% hit to the portfolio. If you can make that your max loss on an earnings day, that's not bad, IMO.

For my own taste, I'd prefer not to own shares during EA but given a collar situation, I'd sooner overwrite calls further out of the money (or sell some add'l bearish call spreads on top of the CC) and buy a put closer to the money thereby limiting more of the potential loss more yet taking in a decent equity gain if a pop occurs. That's probably why I take antacids
