OPNDF (Open Door) 10-Year Sortino Ratio: N/A (As of Sep. 13, 2026)

Author: Vera Yuan Vera Yuan
Vera Yuan
Vera Yuan
Director of Data and Quant Analytics at GuruFocus
Focused on building reliable datasets, financial models, and research tools for value-minded investors. Committed to turning complex data into practical guidance for value-investing and long-term wealth.
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Charlie Tian
Charlie Tian
Founder & CEO of GuruFocus
Dr. Charlie Tian is the founder and CEO of GuruFocus.com, a leading global investment research platform established in 2004. With a Ph.D. in physics, Dr. Tian transitioned from science to finance, applying a data-driven, disciplined approach to value investing.

OPNDF Open Door Inc OPNDF
80 GF Score
Price $2.50
GF Value $3.91
Valuation Significantly Undervalued
! 6 Warning Signs
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What is Open Door 10-Year Sortino Ratio?

The 10-Year Sortino Ratio measures the additional return that an investor receives per unit of the downside risk over the past ten years. As of today (2026-09-13), Open Door's 10-Year Sortino Ratio is Not available.


Open Door  (OTCPK:OPNDF) 10-Year Sortino Ratio Explanation

The 10-Year Sortino Ratio inidicates the risk-adjusted return of an investment over the past ten year. It is calculated as the annualized result of the average ten-year monthly excess returns divided by the standard deviation of negative returns in the ten-year period. The monthly excess return is the monthly investment return minus the monthly risk-free rate (typically the 10-year Treasury Constant Maturity Rate). If the risk-free rate for a specific region is not available, U.S. data is used by default.

Differnt from the Sharpe Ratio that penalizes both upside and downside volatility equally, the Sortino Ratio penalizes only those returns falling below a user-specified target or required rate of return. The expected returns here is set to the risk-free rate as well.


Open Door 10-Year Sortino Ratio Related Terms


OPNDF vs GOOGL, META, SPOT: 10-Year Sortino Ratio Comparison

For the Internet Content & Information subindustry, Open Door's 10-Year Sortino Ratio, along with its competitors' market caps and 10-Year Sortino Ratio data, can be viewed below:

* Competitive companies are chosen from companies within the same industry, with headquarter located in same country, with closest market capitalization; x-axis shows the market cap, and y-axis shows the term value; the bigger the dot, the larger the market cap. Note that "N/A" values will not show up in the chart.


Open Door 10-Year Sortino Ratio vs Interactive Media Industry

For the Interactive Media industry and Communication Services sector, Open Door's 10-Year Sortino Ratio distribution charts can be found below:

* The bar in red indicates where Open Door's 10-Year Sortino Ratio falls into.


OPNDF
80GF Score
Open Door Inc OPNDF
10-Year Sortino Ratio is just one metric. See GF Score™, valuation, warning signs, and more.
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Open Door 10-Year Sortino Ratio Calculation

The 10-Year Sortino Ratio measures the risk-adjusted return of an investment asset or portfolio in the last ten year, focusing specifically on downside risk rather than total risk. A stock / portfolio's 10-Year Sortino Ratio can be calculated by dividing the difference between the ten-year average monthly returns of the investment and the risk-free rate, by the standard deviation of the downside risks over the past ten year.

A downside risk is a potential loss from the asset or investment. The Downside risk here is measured by the downside deviation, which is the standard deviation of negative returns.

Is Open Door (OPNDF) Overvalued in 2026?

Based on GuruFocus' analysis, Open Door stock appears to be undervalued. The current stock price of $2.50 is trading 36.1% below its estimated GF Value™ of $3.91. GuruFocus considers Open Door to be Significantly Undervalued.

Key valuation signals for OPNDF:

  • 10-Year Sortino Ratio: N/A
  • GF Value™: $3.91 vs. price of $2.50 (36.1% below fair value)
  • GF Score™: 80/100 with 6 warning signs

No single metric tells the full story. See the OPNDF stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.


Open Door Business Description

Other Exchanges 3926:Japan
Address 2-17-7 Akasaka, Akasaka Tameike Tower, 6th Floor, Minato-ku, Chikusei-cho, Tokyo, JPN, 107-0052
Open Door Inc is engaged in the planning and operation of game content for mobile phones, software development, and content delivery. It is also involved in development and provision of online systems for the internet and mobile phones. The company operates in two sites Travelko, a travel comparison site and GALLERY JAPAN, a japanese traditional art crafts site.
80GF Score

Get the complete analysis for OPNDF

10-Year Sortino Ratio is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.

$2.50
Price
$3.91
GF Value