Marathon Petroleum to Replace RadioShack in S&P 500 June 30

Marathon Petroleum Corp. will replace RadioShack Corp. (RSH) in the Standard & Poor’s 500 Index after the close of trading on June 30, S&P said in a statement.

Marathon Oil Corp. (MRO) is spinning off Marathon Petroleum in a transaction expected to be completed after regular trading ends on June 30, and “RadioShack’s $1.4 billion market capitalization is more representative of the mid-cap market space,” S&P said. Findlay, Ohio-based Marathon Petroleum refines and markets energy products. RadioShack fell 3.4 percent to $12.75 in after-hours trading as of 5:43 p.m. in New York.

RadioShack, AMC Networks Inc. and Holly Corp. (HOC) will join the S&P MidCap 400 Index, S&P said, replacing Harte-Hanks Inc. (HHS), Boyd Gaming and Frontier Oil Corp. (FTO) Harte-Hanks, Boyd Gaming Corp. (BYD) and Entropic Communications Inc. (ENTR) will enter the S&P SmallCap 600 Index, while Hutchinson Technology, StarTek Inc. (SRT) and Holly will leave that gauge. Those changes will also take place June 30.

Holly is aquiring Frontier Oil in a deal expected to be completed on or about June 30, S&P said.

Companies in the S&P 500 have an average market value of $24.4 billion, while S&P MidCap 400 components have a mean $3 billion and S&P SmallCap 600 members average $876.1 million according to data compiled by Bloomberg. S&P said that more than $1.25 trillion is indexed to its gauges.

To contact the reporter on this story: Joanna Ossinger at jossinger@bloomberg.net.

To contact the editor responsible for this story: Nick Baker at nbaker7@bloomberg.net.

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