By Wallace Witkowski, MarketWatch
SAN FRANCISCO (MarketWatch) — Shares of Facebook Inc. jumped in the extended session Wednesday after S&P Dow Jones Indices said it was adding the social networking company to the S&P 500.
Facebook /zigman2/quotes/205064656/composite FB +0.81% shares surged more than 4% to $51.42 on very heavy volume after S&P said it would add the company to its S&P 500 Index /zigman2/quotes/210599714/realtime SPX +0.24% and to its S&P 100 Index /zigman2/quotes/210600159/delayed OEX +0.22% . Facebook shares were the most active stock after hours at more than 5.4 million shares trading hands.
Other new companies added to the S&P 500 include Mohawk Industries Inc. /zigman2/quotes/207248913/composite MHK -1.94% and Alliance Data Systems Corp. /zigman2/quotes/205162001/composite ADS 0.00% Shares of Mohawk rose 2.4% and ADS shares rose 3%.
Athenahealth shares fell 16% to $110 on heavy volume after the company forecast adjusted earnings of 98 cents to $1.10 a share on revenue of $725 million to $755 million for 2014. Analysts surveyed by FactSet estimated $1.38 a share on revenue of $764.3 million.
ImmunoCellular Therapeutics Ltd. /zigman2/quotes/203863248/composite IMUC +4.04% shares dropped more than 55% to $1.20 a share on heavy volume after the company said its mid-stage study of a brain-tumor treatment did not show a statistical improvement in patient survival rates.
MFA Financial Inc. /zigman2/quotes/206068630/composite MFA -0.52% shares declined 0.7% to $7.10 on moderate volume after the real-estate investment trust’s board cut the quarterly dividend to 20 cents a share from 22 cents a share and increased the share buyback program by 6 million shares.
Coldwater Creek Inc. shares fell more than 10% to 75 cents on light volume after the retailer’s third-quarter loss widened.