Looking today at week-over-week shares outstanding changes among the universe of ETFs covered at ETF Channel , one standout is the Vanguard Mega Cap ETF (Symbol: MGC) where we have detected an approximate $241.8 million dollar inflow -- that's a 3.1% increase week over week in outstanding units (from 32,634,267 to 33,634,267). Among the largest underlying components of MGC, in trading today JPMorgan Chase & Co (Symbol: JPM) is down about 0.4%, Berkshire Hathaway Inc New (Symbol: BRK.B) is off about 0.5%, an ...