Quote from mschey:
I would short one, then buy the other. My theory was that similar assets should be priced similarily. Worked great for a while, lately, not as great as it use to be.
Quote from rarhoads:
I don't trade pairs anymore, but when I did this website was a good resource for correlated stocks -
www.impactopia.com
Click on the link under USA Equities and you can enter a symbol and find what stocks may trade well with it.