KeyBanc downgraded Duolingo (NASDAQ:DUOL) from an Overweight to a Sector Weight rating, following a significant stock price decline.Despite surpassing revenue and earnings expectations, Duolingo faces weak future bookings guidance and competition from emerging language learning models (LLMs).Technical analysis suggests a potential further decline in Duolingo's stock price, with current valuation remaining high despite recent drops.On November 6, 2025, KeyBanc downgraded Duolingo (NASDAQ:DUOL) from an Overwe ...