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On October 9, 2025, , marking its lowest volume day in recent trading history. , ranking it 258th among all listed equities in terms of liquidity. This performance followed a series of strategic updates and market dynamics affecting the language-learning platform.
Recent developments highlighted Duolingo's expansion into generative AI tools, with the company unveiling a new feature allowing users to practice conversational skills through AI-driven dialogue. While the move was praised for enhancing user engagement, analysts noted the feature's limited monetization potential in the short term. Additionally, regulatory scrutiny over data privacy practices in international markets added cautious sentiment among investors, contributing to the stock's underperformance.
Market participants also observed mixed reactions to Duolingo's Q3 user growth metrics, . The company attributed the growth to seasonal factors and its expanding content library, though competitors in the edtech sector reported stronger subscriber additions during the same period. This comparative context tempered investor enthusiasm ahead of the earnings window.
To perform this back-test rigorously we need to generate, for every trading day from 2022-01-03 to 2025-10-09: a list of all exchange-listed equities; each stock’s daily trading volume; the 500 names with the highest volume for that day; and a one-day holding (buy today, sell at the next day’s close). Our current back-testing engine can execute strategies on a single security or on an already-prepared set of portfolio P&L data, but it does not yet automate universe construction and daily position re-balancing across hundreds of tickers.
Two practical options remain for proceeding: use an externally prepared daily P&L representing a 500-stock equal-weight “top-volume” portfolio, or narrow the question to a single security or ETF proxy. Full performance statistics and visualizations will be provided once the preferred methodology is confirmed.

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