(For faster updates on individual market-movers, Eikon users please use search string "STXBZ US"; for the Day Ahead newsletter, link.reuters.com/mex49s; for the Morning News Call newsletter, link.reuters.com/nex49s) U.S. stocks fell on Monday after Greeks overwhelmingly rejected conditions of a rescue package from creditors, throwing the future of the country's euro zone membership into further doubt. The Dow Jones industrial average was down 0.31 percent at 17,674.33 and the S&P 500 was down 0.33 percent at 2,069.93.
** HUMANA INC, $192.34, +2.58 pct
** AETNA INC, $117.25, -6.58 pct
** CENTENE CORP, $72.48, -2.63 pct
** HEALTH NET INC, $70.08, -2.08 pct
** ANTHEM INC, $161.17, -1.21 pct
** CIGNA CORP, $158.86, -1.51 pct
** UNITEDHEALTH GROUP INC, $121.84, +0.02 pct
Health insurer Aetna on Friday said it would buy smaller rival Humana for about $37 billion in cash and stock, in the largest ever deal in the insurance industry.
The deal will face rigorous scrutiny from U.S. regulators, which antitrust experts said could also make other large-scale mergers in the sector more difficult.
** ONCOLYTICS BIOTECH INC, $0.6239, +15.56 pct
The Canadian biotech said data from the mid-stage study of its experimental drug, reolysin, in combination with chemotherapy gemcitabine suggests an increase in median overall survival.
** ENZON PHARMACEUTICALS INC, $1.433, +18.43 pct
The company announced a special cash dividend of 50 cents per share payable on Aug. 12 to stockholders of record as of July 21.
** HORSEHEAD HOLDING CORP, $9.6201, -15.98 pct
The zinc and nickel producer's stock touched a two-and-half year low of $8.33 after analysts at BB&T downgraded the stock to "hold", citing lower production at the company's Mooresboro unit in North Carolina and a fall in zinc and nickel prices.
** WEIGHT WATCHERS INTERNATIONAL INC, $4.89, +19.56 pct
A hedge fund is in talks with potential partners to make an offer for Weight Watchers, the New York Post reported. (bit.ly/1gjfCLt)
** CATABASIS PHARMACEUTICALS INC, $13.8481, +11.68 pct
The drug developer said its experimental muscle disorder drug, codenamed CAT-1004, received "fast track" status from the U.S. FDA.
** ALLOT COMMUNICATIONS LTD, $6.006, -15.17 pct
The Israel-based bandwidth management service provider said it expects 2015 revenues of $100 million-$105 million, compared with $117.2 million a year earlier.
** ALLIANCE FIBER OPTIC PRODUCTS INC, $20.75, +11.80 pct
The maker of fiber optic components said it expects second-quarter revenue of about $25 million, above the average analyst estimate.
** EHEALTH INC, $13.54, +11.81 pct
RBC Capital Markets upgraded the stock to "outperform" from "sector perform" and raised its price target to $16 from $14.
Analyst David Francis said the company's Medicare business is set to outperform meaningfully in the short term.
** CHEVRON CORP, $95.02, -0.89 pct
** REX ENERGY CORP, $4.6, -8.18 pct
** COMSTOCK RESOURCES INC, $2.29, -6.53 pct
** OASIS PETROLEUM INC, $13.61, -6.97 pct
** ENERGY XXI LTD, $2.18, -5.63 pct
** SEVENTY SEVEN ENERGY INC, $3.6, -7.46 pct
Shares of oil and gas companies down as oil prices fall after Greece rejects debt bailout terms and China rolls out emergency measures to support its stock markets, adding to concerns about demand at a time of global oversupply.
** INVIVO THERAPEUTICS HOLDINGS CORP, $17.06, +8.94 pct
The biotech said a patient who was evaluated one month post implantation of its Neuro-Spinal Scaffold regained spinal sensation with improved bladder function. Another patient evaluated six months post-implant regained partial sensation from lower ribs to hip on right and made progress in daily activities.
** CELSION CORP, $2.41, +2.55 pct
The cancer therapy developer said interim data from a mid-stage study shows that more than two-thirds of breast cancer patients responded to its experimental therapy, ThermoDox. (Compiled by Anet Josline Pinto in Bengaluru; Edited by Maju Samuel)