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IAC, Questar to Join S&P 500

DirecTV also will be added upon the acquisition of Freescale.









are each set to be added to the

S&P 500

index, Standard & Poor's said Tuesday.

Internet conglomerate IAC will replace



following the telecom-gear maker's acquisition by


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will replace Lucent in the S&P 100.

Questar, meanwhile, will replace North Fork Bancorp, which is being acquired by

Capital One Financial

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In turn, Capital One Financial will replace



in the S&P 100. OfficeMax, with a market capitalization of $3.6 billion, currently ranks No. 100 in the index.

The IAC and Questar moves are effective after the close of trading Nov. 30.

Standard & Poor's also said that



will replace

Freescale Semiconductor


in the S&P 500 on a date to be announced. Freescale is being acquired by a consortium of private equity firms led by the Blackstone Group in a deal that is still pending final approvals.

Shares of IAC recently jumped $1.82, or 5.4%, to $35.59 in after-hours trading, while shares of Questar climbed $1.55, or 1.9%, to $84.02. DirecTV advanced $1.10, or 4.9%, to $23.50.

The stocks of companies added to the S&P 500 often see a boost because mutual funds that track the index must buy the shares.