After-Hours Movers Monday: Callon Petroleum Co., Callaway Golf Co.

Matthews International Corp.

rose more than 8 percent in Monday's extended trading, changing hands recently at $55.98. But the Pittsburgh-based cemetery products supplier was quiet on the news front. Several smaller oil and gas companies were among after-hours movers Monday, perhaps on news that oil prices gained more than 1 percent on a weaker U.S. dollar. Bonanza Creek Energy Inc.

gained nearly 3 percent in after-hours session Monday, changing hands recently at $25.31. The shares are off more than 55 percent in the past six months, and closed down 3 percent Monday. W&T Offshore Inc.

recouped some of its earlier losses, trading recently in the extended session up 2.6 percent at $5.07. It closed down earlier by nearly 2 percent. Laredo Petroleum Inc.

picked up 2.5 percent in late trading to $11.99, after closing down by a similar percentage. Callon Petroleum Co.

continued to gain after hours, trading up nearly 2 percent to $7.43, after closing up more than 5 percent. Elsewhere in the world of finance, China Finance Online Co.

fell more than 14 percent to $5.30 in the extended session after the company posted fourth-quarter results. Beijing-based Concord Medical Services Hldg Ltd.

declined more than 10 percent to $5.92, also on unfavorable quarterly results. Flint, Michigan-based Diplomat Pharmacy Inc.

declined 3.5 percent to $26.80 in the extended session. The company unveiled a 7.4 million-share public offering. Callaway Golf Co.

lost 3 percent in extended trading to $9.25, giving back some of its 11 percent gain in Monday's regular session. The Carlsbad, California, company didn't issue news but got upgraded by Imperial Capital. Jumei International Holding Ltd.

dropped nearly 3 percent to $15.75 in late trading. The shares closed up 8 percent and the Beijing-based online retailer posted fourth-quarter earnings after the bell.