Obviously there's a big difference in hedging with vertcals/diagonals vs collars and there are so many possibilities that there's no simple one size fits all answer. Be that as it may, I don't think it makes much difference with vert vs collar in a high IV environment. What you overpay for the long leg, you get back from the short leg. It still ends up being the protective strategy difference rather than nickels of premium difference.Quote from JuryRigged:
In periods of high volatility, spread trades are your best bet to minimize the increased cost of protection due to increased volatility.
Depending on your mid-term market outlook, you have two choices for the hedge. If you think downside risk is only going to last a short time, enter an ATM-OTM vertical put spread. This decreases the debit for the ATM put, hedges I-vol, and mutes theta decay.
Example: Long SPY Sep 120p, Short Sep 112p. Total debit 1.96 (1.63%)
If you feel downside risk is going to last a more than a month, enter a diagonal put spread, with the long leg three to four months out. Sell the OTM weeklies at your short-term downside target and roll the short leg each week (with an updated downside target).
Example: Long SPY Dec 120p, Short Sep 2 115p. Total debit 6.73
If you can generate .33 in premium for the short calls each week, you can reduce your cost basis down to about 2.00% at Dec expiration, and you'll have had the protection for three months.
You can always ratio the spread to give you more downside protection by shorting fewer calls than you are long. Or if things get really ugly, just buy to close the short calls and have complete downside protection.
If the market begins to show strength, the long-dated put can be sold to close with an excellent percentage of extrinsic value.
As for the suggestion to use a diagonal, I'd go with the vertical because in general with an UL collapse, its delta will rise more than that of the diag, providing better somewhat protection.
And a strike against the weeklies is that as the UL drops, in order to get that 33 cts of offset, he'll be writing successively lower strikes, potentially locking in a loss with a rally.
Obviously, there a many price possibilities so the best outcome will be determined by when the price drops as well as how much it drops.