Characterize the news's sentiment using the following options.
Options: negative, positive

Germany's Federal Cartel Office is investigating whether Apple's third-party app tracking rules give the tech behemoth preferential treatment or undermine competition, according to a Financial Times report Tuesday (June 14). The German antitrust watchdog is concerned that Apple's rules are “self-preferencing” and stifle competition given Apple's ability to “unilaterally set rules for its ecosystem.
negative