Standard & Poor's said Wednesday that flash memory company
( CHIR) in the
Chiron is set to be acquired by pharmaceutical giant
in a deal that is pending final approval. S&P said the index change will go into effect after the close of trading April 19.
, a provider of gaming and lottery products, will replace SanDisk in the S&P MidCap 400.
Shares of SanDisk jumped $4.49, or 7.6%, to $63.96 in after-hours trading. Shares of companies added to the S&P 500 often rise because fund managers who track the index have to own the shares. Shares of Scientific Games also got a boost, adding $1.68, or 4.8%, to $36.80.
On Tuesday, Standard & Poor's said
will be added to the S&P 500 to replace
( GDT), which is being bought by