Quote from Malinois:
I daytrade [ER2] equity index futures from the
long-side and would like to insure against ...
something which takes the market down several
percent or more instantly
OTM index puts in SPX, OEX, SPY or ES, whichever
looks cheapest and whichever you can get on the
bid. Don't worry about the correlation between
ER2 and any of these, in a sharp disaster-related
downspike, the correlation will go close to 100%.
Long index puts have a negative mathematical
expectation -- best-fit-to-market-data jump-diiffusion
paramerrs indicate option traders overestimate
downspike frequency by 50% or more and magnitude
by at least 25% -- but that is the price you will pay
for the insurance. If your portfolio consists mostly
of your long ER2 trades, your expected portfolio
log return will almost certainly be improved (greater
terminal wealth).