Anyone play these on a consistent basis?  Would  shorting calls in each be viable as a way to take advantage of any drag or compounding issues each hold.

I use spy to beta weight my portfolio and would probably short more tna calls vs tza calls for more overall negative deltas as the market moves up on this countertend rally towards major fib lines.

Thoughts?  Suggestions?  Please let me know your experiences with these ETFs.

Thanks as always!

#contangoetfs