I think you guys are assuming something completely different from what I'm doing. Yes, today I thought there was a very good chance of a market rally from the open. But I don't just step up and buy 30,000 spy or $3M worth of stock and let'er rip. I have a system that I execute the same way every day. I try to be ambivalent as to market direction. My hunches are not always right and most of the time I have no clue what's going to happen. I can't take big directional bets based on a gut feel, I have no edge doing that and would never want to take those kinds of risks.
Based on what I was seeing this morning, I expected my system would have me long, but I didn't know for sure. I built in a slight long skew because of what the market was doing. When I start applying a hedge, it's because my net market exposure in dollar terms is getting too great. Sure it's awesome to be long 50,000 shares of stock when the market rallies. But when it rolls over quickly it sucks and account equity can evaporate quickly. At some point I begin hedging because I'm more concerned with protecting my ass than giving up potential profits.
The reason I don't just trade spy options is because 1) I have a prop account and buying power is not an issue and 2) I have to have the stock and hedge in the same account. If my hedge saved me from a disastrous day but the stocks were naked positions in a separate account, now that account just got obliterated and I would need to get money there overnight to trade the next day. Options aren't offered in this account.
Btw, I lost $45,000 on spy today, but yesterday I made $30,000 on it and ended the day at zero overall. I'll take the smoother equity curve any day.