Apple's lucrative deal with Google could be under threat after a U.S. judge ruled that the Alphabet-owned search giant was operating an illegal monopoly. A potential remedy for Google to avoid antitrust actions could involve terminating the agreement, which makes its search engine a default on Apple devices, Wall Street analysts said on Tuesday.Ticker Security Last Change Change % GOOGL ALPHABET INC. 158.29 -0.96 -0.60% AAPL APPLE INC. 207.23 -2.04 -0.97% Google pays Apple $20 billion annually, or about ...