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Why Alarm.com Stock Plummeted Today

Why Alarm.com Stock Plummeted Today

What happened Shares of Alarm.com (NASDAQ: ALRM) have plummeted today, down by 19% as of 1:15 p.m. EDT, after Alphabet (NASDAQ: GOOG) (NASDAQ: GOOGL) subsidiary Google announced that it would invest in rival ADT (NYSE: ADT) as part of a strategic partnership.