How'd you work that one out? IPE volume is mushrooming since they went all electronic - typically over 130,000 contracts a day, quite a difference compared to the emiNY which is also a half size contract.
The NYMEX (full size pit contract) averages around 340,000 combined daily volume (across all months). IPE volume averages 130,000 (across all months) is nothing to sneeze at but its nowhere near the NYMEX. I think if the IPE improves its technology it could really boost its volumes.
I had up Brent on IPE --today and damn that things move around even more than the QM. It was jumping all over the place.