Questar Corp. replaces North Fork on the S&P 500

Salt Lake-based energy company Questar Corp. will replace North Fork Bancorporation Inc. on the Standard & Poor's 500.

Questar joins IAC/InterActiveCorp. They replace Lucent and North Fork.

Questar's place in the S&P MidCap 400 will be taken by ValueClick Inc.

The changes are effective Nov. 30.