Korro Bio, Inc. (KRRO): fair value, margin of safety and Wheel Score

Is KRRO undervalued?

Korro Bio, Inc. (KRRO) closed at 9.31 on 16 Oct 2026. The GLS average fair value - the simple average of the 1 valuation models that produced a positive number - is 10.44, so the price sits 11% below it. 1 of the 1 models value the shares above the current price. A margin of safety between 10% and 30% is where most of the Sunday Scan candidates come from.

Only 1 of the nine models produced a value (DCF); the others need a dividend, positive free cash flow or positive book value the company does not have yet, so the average rests on a narrow base.

The nightly engine files KRRO under Speculative / Distressed - negative earnings or a Piotroski score of 3 or less - which caps its Wheel Score at 45 and keeps it out of the Sunday Scan.

Nine valuation models for KRRO

Each model turns the latest filed numbers into a value per share; the GLS fair value is the simple average of the ones that produce a positive number. The last two rows are shown for reference and never enter the average. The Quote page lets you switch any model off and add your own margin of safety.

Quality and financial health

Financial health is weak: KRRO passes 2 of the nine Piotroski tests. Our screens drop the stock at the health rule; a low score is often the reason a stock looks cheap on the valuation models. The GLS Moat score is low at 1.6 out of 10, which says the ten-year record of revenue, earnings, margins and returns on capital has been inconsistent - growth and shocks rather than steady compounding.

Returns on capital are thin or negative - ROIC -123.5%, ROE -228.0%, ROA -103.3% - with debt at 0.85 times equity and negative free cash flow.

Korro Bio, Inc. pays no dividend, so the DDM model does not apply and a covered-call holder earns only the premium and any price gain.

Institutional ownership scores 10/10, insider activity 7/10 and Congressional trading 5/10 on the GLS smart-money scales.

Wheel Score 40: Weak

KRRO scores 40 out of 100 on the Wheel Score, in the Weak band (under 50). Value 17/25, Health 4/20, Moat 2/15, Premium 10/20, Stability 6/20. The score is not a judgement on the company; it says the price, quality and premium do not line up for selling puts on it today.

Implied volatility is 102% on the near-the-money contracts 20-60 days out - above the 60% ceiling of the sweet spot. Premiums are large, but the Wheel Score tapers the Premium points (10 of 20) because volatility this high usually comes with a reason. Chain open interest is thin - 1,626 contracts across every expiry - so fills at a fair price are not guaranteed; a 30-45-day put may not exist at a usable strike.

Volume runs at 440k shares a day on a market cap of $137M, with a beta of 2.36 - a high beta, so the stock tends to move more than the market and a strike can be gapped through; the Stability part of the Wheel Score gives that 6 of 20.

The Wheel Score ranks ~7,400 US stocks for selling cash-secured puts and covered calls; it is updated nightly and is not a recommendation. The walkthrough lesson shows how the score fits into a trade, start to finish.

Upcoming events

The next earnings report is due on 11 Nov 2026, 26 days away; a 30-45-day put sold today would expire after it, which is worth weighing against the premium.

Earnings, dividend, IPO, split and economic calendars for the whole market, filterable to your watchlists.

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