Arena Pharmaceuticals, NBTY, AIG, Opnet Technologies among big market movers Thursday

Arena Pharmaceuticals, NBTY, AIG among big movers

NEW YORK — Stocks that moved substantially or traded heavily Thursday on the New York Stock Exchange and Nasdaq Stock Market:

NYSE

NBTY Inc., up $16.27 at $53.74

The Carlyle Group has agreed to buy the vitamin maker for $3.8 billion in cash in the largest private equity deal so far this year.

JP Morgan Chase & Co., up 11 cents at $40.46

Net income soared as a slowdown in losses from failed loans helped offset a difficult spring in trading and investment banking.

Skilled Healthcare Group Inc., up 53 cents at $2.78

The company agreed to settlement talks in a lawsuit that accused the nursing facility operator of inadequate staffing.

American International Group Inc., down 15 cents at $37.38

Harvey Golub resigned as chairman, citing a bad working relationship with CEO Bob Benmosche.

Capital One Financial Corp., down $1.27 at $43.26

Capital One wrote off a lower rate of uncollectable balances in June, and late payments fell to their lowest point in the year.

NASDAQ

Arena Pharmaceuticals Inc., down 36 cents at $3.92

A study showed that Arena’s lorcaserin prompted weight loss over one year without heart-related side effects.

Verenium Corp., up 74 cents at $3.20

BP is acquiring Verenium’s business in cellulosic biofuels, or fuels made from grasses, canes, softwoods and other biomass.

Opnet Technologies Inc., down $1.85 at $14.04

Opnet lowered its revenue forecast due to a big seasonal slowdown in demand and delays in several six-figure deals.