Duolingo Inc (DUOL) — Quality & forensics

As of 2026-09-18 — refreshed nightly. Closelook readings from an investment research diary, not ratings or advice.

The Closelook module scores

51 /100 composite · 7 modules · software-infra weight set

Valuation 44
Quality 74
Growth 59
Balance sheet 85
Cash quality 26
Capital allocation 14
Momentum 55

Scores are computed nightly across the coverage universe and read relative to it — the methodology lives in the company-scoring explainer.

Financial forensics — the academic screens

7.86 Altman Z-Score

Sits in the safe zone (above 2.99). The Z-Score estimates financial-distress risk from five balance-sheet and earnings ratios.

3/8 Piotroski F-Score

Nine binary fundamental-strength checks across profitability, leverage and operating efficiency.

-2.05 Beneish M-Score

Screens reported earnings for statistical manipulation patterns — below the −1.78 manipulation-risk threshold. A screen, not an accusation.

Continue: the DUOL chart & overview · the earnings record

FAQ · from the current data · as of 2026-09-18

Quick answers

What is Duolingo Inc's Closelook quality reading?

The composite reads 51/100 across 7 modules, as of 2026-09-18: valuation 44, quality 74, growth 59, balance sheet 85, cash quality 26, capital allocation 14, momentum 55. Closelook scores are research diary readings, not ratings or investment advice.

What is Duolingo Inc's Altman Z-Score?

7.86, which sits in the safe zone (above 2.99) as of 2026-09-18. The Altman Z-Score estimates financial distress risk from five balance-sheet and earnings ratios.

What is Duolingo Inc's Piotroski F-Score?

3 of 8, as of 2026-09-18. The F-Score counts nine binary fundamental-strength signals across profitability, leverage and operating efficiency.

What does Duolingo Inc's Beneish M-Score indicate?

-2.05 — below the −1.78 manipulation-risk threshold, as of 2026-09-18. The M-Score screens reported earnings for statistical manipulation patterns; it is a screen, not an accusation.

Mentioned on Closelook

Where DUOL appears in the diary — 5 pieces, newest first. Every link is our own writing.

Dailies

Rates — the Fed hikes and the 10-year closes above 5%: the belly sold, the relief unwound, chips back under $505Morning 10 · 17 Sept 2026The equipment names were sold a third time, Applied Materials −1.4%, Lam −0.6%, KLA −0.4%, onsemi −9.0%, and the software names were marked on the discount rate: the Agentic Winners 40 −1.3%, Adobe −2.8%, Intuit −3.4%, Duolingo −3.7%, the…
Software and semis sell off together at midday — the green sits outside techMidday 10 · 1 Sept 2026DUOL is up 5.94% to 157.17 by midday, the strongest move among the day's notable gainers.
In-line core PCE leaves both bond lines standing as the tape flattens into a five-print evening — Nvidia the refereeMidday 10 · 26 Aug 2026SPLV trades back above its 50-day average near 75.81, and VIXY at 17.91 sits within half a percent of its 52-week low of 17.84 — a quiet-volatility read that cuts against the single-name carnage in INTU and DUOL.
Semis get rejected at the overhead line — SOXX -6.1%, SMH back below its 50-day — while the new sovereign-bond watch says this selloff isn't a rates storyMidday 10 · 18 Aug 2026DUOL adds 7.43% by midday, trading at 139.84.
The macro week breaks at the last print — retail and Michigan miss, bonds slip the floor, and Lumentum runs from the middleMidday 10 · 14 Aug 2026Duolingo — the other side of the sorting

Related in the Closelook universe

same Closelook index seat first, then Software - Application. Scored names rank on their Closelook score; names without one rank on trend state — above or below their 50- and 200-day averages — never on a score they do not carry.