I currently trading 2/10 steepener or flattener using two ETFs: STPP and FLAT. These ETFs are very illiquid, and I am thinking about switching to futures for the curve trades. My broker, Interactive Brokers, offers a ticker TUT to trade the 2/10 curve with a face value of $300,000 per contract. Now I need to find equivalent size of TUT to replace the STPP/FLAT ETFs that I am familiar with. I charted the past performance of TUT and found that it's only about 1/10 of the performance of STPP/FLAT for a same period. For example, in the past 3 months, STPP moved -7% but TUT only moved -0.7% on the charts. Does this mean that going long one TUT contract is about the same as going long $30,000 STPP? Thanks.