Later this summer R2k will be traded on ICE instead of CME. I would imagine that ER2 loses a few daytraders each day as they move to alternative contracts
Summertime slowness. I trade a variety of markets (including the ER2) and noticed this last summer, especially after July 4. I doubt it's the beginning of a trend, just something that happens this time of year due to vacations, etc.
You must not have been trading the ER2 very long. It seems as thick as it ever was to me. Hopefully some people will go trade something else. It was much more profitable a couple of years back.