Looking today at week-over-week shares outstanding changes among the universe of ETFs covered at ETF Channel , one standout is the iShares Core S&P Mid-Cap ETF (Symbol: IJH) where we have detected an approximate $164.4 million dollar outflow -- that's a 0.2% decrease week over week (from 1,531,750,000 to 1,529,250,000). Among the largest underlying components of IJH, in trading today EMCOR Group, Inc. (Symbol: EME) is down about 1.6%, Comfort Systems USA Inc (Symbol: FIX) is off about 0.7%, and PURE Storage ...