If I'm not mistaken, there are quite a few futures-backed ETFs that roll continuously -- VXX perhaps? So it's not like it's not possible. It's baffling to me th

If I'm not mistaken, there are quite a few futures-backed ETFs that roll continuously -- VXX perhaps? So it's not like it's not possible. It's baffling to me that fund managers are either oblivious to how much they're moving the market, or that they don't care.