Stocks that moved substantially or traded heavily Monday:
Nutrisystem Inc., up $9.48 to $43.68
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The weight loss company agreed to be acquired by Tivity Health for $47 a share in cash and stock.
Yelp Inc., up $1.05 to $35.64
A shareholder is seeking a shakeup of the board at the online review company.
Nvidia Corp., up $4.25 to $151.86
Technology companies held up better than the rest of the stock market.
GoPro Inc., down 5 cents to $4.92
The camera maker says it will move production of U.S.-bound cameras out of China by the summer over tariff-related concerns.
Qualcomm Inc., up $1.25 to $57.24
The U.S. chipmaker says it has won an order in a Chinese court banning some Apple phones in China over alleged patent infringements.
Marathon Oil Corp., down 75 cents to $15.30
The price of oil turned lower after rallying last week.
Bank of America Corp., down 67 cents to $24.76
Banks fell sharply as interest rates continued to drop.
Teva Pharmaceutical Industries Ltd., down 97 cents to $18.44
The Washington Post reported on alleged price-fixing by Teva and more than a dozen other generic drug companies.