(Image source: khq.com) Shares of the financial holding company Umpqua Holdings Corp (NASDAQ:UMPQ) are advancing in the early session on news that it replace Scientific Games Corp (NASDAQ:SGMS) in the S&P MidCap 400 index. On the other hand, Scientific Games will move over to the S&P SmallCap 600 index, which was the prior home of Umpqua. The switch is expected to take effect after the trading session closes on Thursday.