Tinder-parent Match Group Inc. MTCH, +3.99% is the subject of a lawsuit filed by Bumble Trading Inc., which alleges that Match stole trade secrets while in acquisition talks with Bumble. The suit contends that Match asked Bumble for confidential business plans so that it could increase its offer price, before "abruptly, and without warning" ending negotiations when it filed its own trade-secret and intellectual property lawsuit against Bumble earlier this month. Bumble called that lawsuit "baseless." Match Group didn't immediately respond to MarketWatch's request for comment. Match shares are up 2.4% in Thursday trading and 173% over the past 12 months, compared with an 11% gain for the S&P 500.