Juniper Networks

(JNPR) - Get Report

will replace



in the

S&P 500

after the grocer is acquired, Standard and Poor's said Thursday.

The change will come on a to-be-announced date, S&P said. Albertson's is in the process of being bought by





(CVS) - Get Report

in a deal that is still pending final approval.

Shares of Juniper, a network-equipment maker, recently jumped 91 cents, or 6%, to $16.20 in after-hours trading. Companies added to the S&P 500 often see their shares get an initial lift because mutual funds that track the index will have to buy the stock.

S&P also said that

Commercial Metals

(CMC) - Get Report

will be added to the S&P MidCap 400 index. The metal manufacturer and recycler will replace

Independence Community Bank

( ICBC), which is being acquired by

Sovereign Bancorp

( SOV).

Commercial Metals shares recently rose 58 cents, or 2.4%, to $25.19 in late trading.

In addition, S&P said

Lincoln Electric Holdings

(LECO) - Get Report

will replace

Education Management


, which is being bought by private investors, in the S&P MidCap 400. Lincoln Electric was originally set to take the place of

Anteon International

( ANT) in the MidCap 400, but Anteon's acquisition by

General Dynamics

(GD) - Get Report

still doesn't have regulatory approval. S&P said Anteon's replacement will be announced when the completion of the deal is clarified.