Match Group Inc. /zigman2/quotes/207178501/composite MTCH -2.35% shares surged in the extended session Friday after S&P Dow Jones Indices said the dating-app company will be added to the S&P 500 index /zigman2/quotes/210599714/realtime SPX -1.30% . Match shares rallied as much as 9% late Friday following the announcement. Match replaces Perrigo Co. /zigman2/quotes/201110862/composite PRGO +0.48% , which will replace WW International Inc. /zigman2/quotes/200896816/composite WW -6.69% on the S&P MidCap 400 /zigman2/quotes/219506813/composite MID -1.63% , as the company formerly known as Weight Watchers moves to the S&P SmallCap 600 /zigman2/quotes/210599868/delayed SML -1.08% .







