Mainly long call options, but just with the major oil companies. When I have a good gain I sell & wait for another buy opportunity.
If i bought 20,000 shares of BP today it would cost $700,000 @ Fri close of $36.92. I can buy 200 BP contracts & control 20,000 shares for about $110,000 . BP $30.00 2018 ask $6.35. If oil continues down I might be able to buy @ $4.50/5.00 , that is my approximate bid. May not fill, however it might.
The high delta quickly brings down the bids when the underlying goes down, I don't bid based on the bid/ask but on what it will probably fall to if the underlying fall 10%
Stadtmuller