Nektar to replace Casey's in S&P SmallCap 600

Nektar Therapeutics (Nasdaq: NKTR) will replace Casey's General Stores Inc. (Nasdaq: CASY) in the S&P SmallCap 600 after market close on June 25, 2015. Shares of Nektar Therapeutics rose 88 cents to close at $13.45 while Casey's General Stores stock climbed $1.74 to close at $96.96.