Rubicon Technology, Inc. (RBCN): fair value, margin of safety and Wheel Score

Is RBCN undervalued?

Rubicon Technology, Inc. (RBCN) closed at 5.60 on 16 Oct 2026. The GLS average fair value - the simple average of the 6 valuation models that produced a positive number - is 36.21, which puts the price 85% below it. 6 of the 6 models value the shares above the current price. A gap this wide is rare in our universe of ~7,400 US stocks and is exactly what the Value part of the Wheel Score rewards; it is also where the question "why is it this cheap?" matters most.

There is a wide gap between Lynch (8.62) and Payback Time (65.95). When the models are this far apart the "fair value" is really a range, and the margin of safety above should be read with that range in mind.

The nightly engine files RBCN under High Growth: revenue and earnings growing fast enough that the growth-based models carry the valuation.

Nine valuation models for RBCN

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

Rubicon Technology, Inc. scores 5 of 9 on the Piotroski F-score: a middling result that falls one point short of the Sunday Scan's "6 or more" rule. Some of the nine tests on profitability, leverage and efficiency are failed, so the accounts are worth a look before selling a put on the name. A GLS Moat score of 1.5/10 is a weak reading: the ten-year history the score grades (revenue, EPS, book value, margins, cash flow, share count, ROIC) has not been steady, so the Moat part of the Wheel Score contributes little.

Returns on capital are high - ROIC 22.5%, ROE -9.9%, ROA 1.7% - with debt at -1.44 times equity and a free-cash-flow yield of 117.3%.

Rubicon Technology, Inc. pays no dividend, so the DDM model does not apply and a covered-call holder earns only the premium and any price gain. Revenue comes mainly from Optical 100% (quarter Q4 FY2021).

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

Wheel Score 39: No options

No options are listed on Rubicon Technology, Inc. in our nightly snapshot. The Wheel Score is therefore capped at 39 (it reads 39) and the stock is left out of every options screen; the fair value and health figures above are still useful for a plain stock position.

Volume runs at 0k shares a day on a market cap of $13M, with a beta of 2.16 - 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 3 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 12 Nov 2026, 27 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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