toady13 said:
I'm wondering if one could buy equal volume puts on both ultra bear and bull ETFs since over time there is a theoretical decay in the price.
For example, ytd on SSO is +2.46% and ytd SDS is -6.39% for a net of -3.93%
Another example: ytd on YINN is -7.47% and ytd YANG -23.46%
If you buy equal volumes of puts, wouldn't you end up ahead over time?
Not necessarily .. in an up and down swinging market.. yes. But if the market moves consistently up or down in a slow manner.. you will lose because of the compounding (opposite of decay) if it moves in one direction. If you did this Jan 2-Dec 31, 2013, you lost about 20% spread:
SSO price: Jan 2 close 63.29, Dec 31 close 102.56 (+62%)
SDS price: Jan 2 close 51.40, Dec 31 close 29.66 (-42%)
Also if you are short/put, maximum gain is 100% (stock goes to 0), maximum loss is infinite. So in a strong bull or bear market, one ETF can double or triple in price while the other one would just get lower and lower but you won't gain more than 100% on that one if you are short/put.