Here is something I have been racking my brain over, we can buy any to etfs,inverse and regular, the next day, one will be up, the other down, so, I sell the one up, make what ever percent, lets just say 5 percent, now I still own the other etf, but I will chasing it, with another buy, but what is so cool about this, is being I made 5 percent the day before, I have an extra 5 percent, to play with for free,