Price to Free Cash Flow Ratio Backtest

The Price-to-Free Cash Flow (P/FCF) ratio a popular valuation ratio among value investors. It is similar to the P/E ratio but free cash flow is just operating cash flow minus capital expenditures.  Because it relies on the Statement of Cash Flows, it is thought to be less susceptible to accounting manipulation. Free cash flow is also similar to Warren Buffett’s concept of Owner’s Earnings, which he uses to value companies. The P/FCF ratio is calculated as follows:

P/FCF = Market capitalization / Free Cash Flow

Let’s take a look at a backtest of this ratio to see how it works. I used the data and backtesting tool provided by Portfolio123. The Portfolio123 backtesting eliminates the problem of survivorship bias by using point-in-time and retaining data on stocks that have gone to zero. This backtest uses the same filtered universe of stocks as my recent PEG Ratio Backtest. I’ve designed the filtering criteria for this backtest specifically for individual investors and with a focus on enhancing data quality. The filters include the following criteria:

  1. No OTC stocks. Stocks not traded on the New York Stock Exchange, NASDAQ, or American Stock Exchange markets are excluded. The quality of fundamental stock data for OTC can be somewhat lower and less timely that that for stocks traded on major exchanges.
  2. No ADRs. Fundamental data for foreign American Depositary Receipt can include errors due to currency exchange, different accounting standards, and share count.
  3. Exclude the Financial Sector. The concept of free cash flow does not really work the same way for banks and other financial sector companies.
  4. Liquidity test. The average daily total amount traded over the past 60 trading days must be larger than $100,000.  This amount was selected so that a $1 million dollar portfolio could hold 100 positions and that each new $10,000 position would not exceed 10 percent of a day’s trading volume. The liquidity test also ensures that the backtest has reliable market price information for any of the stocks that are being tested.
  5. Market Cap > $50 million. Nano cap stocks are excluded to help improve data quality. This filter also ensures that positions in a modest sized portfolio never exceed one percent of shares outstanding or the available float for a company.
  6. Price > $1. True penny stocks are excluded due to various information issues and manipulation of these stocks.
  7. P/FCF ratio > 0. This filter insures we are looking at stocks that actually have valid data on the P/FCF ratio.

After these filters are applied, we are left with approximately 1,300 to 1,900 stocks. These stocks are then ranked by the criteria being tested; in this case, we are testing the P/FCF ratio. The lowest 20 percent of stocks ranked by the P/FCF ratio are placed in the first quintile and the next 20 percent in the second quintile and so forth until we have five portfolios of stocks. The portfolios are rebalanced every 12-months and compounded annually to more realistically replicate what an individual investor might be expected to do to avoid higher short-term capital gains tax and trading costs. The following 5 charts display the quintile returns for the P/FCF ratio in red and the S&P 500 Equal Weight Index in blue.  The first quintile includes the companies that had the lowest P/FCF ratios and the 5th quintile includes the companies that had the highest P/FCF ratios.

P/FCF Ratio Quintile Returns – 2000 – 2013

Price to Free Cash Flow Ratio 1st Quintile
Price to Free Cash Flow Ratio Backtest 1st Quintile


Price to Free Cash Flow Ratio 2nd Quintile
Price to Free Cash Flow Ratio Backtest 2nd Quintile


Price to Free Cash Flow Ratio 3rd Quintile
Price to Free Cash Flow Ratio Backtest 3rd Quintile


Price to Free Cash Flow Ratio 4th Quintile
Price to Free Cash Flow Ratio Backtest 4th Quintile


Price to Free Cash Flow Ratio 5th Quintile
Price to Free Cash Flow Ratio Backtest 5th Quintile


Price to Free Cash Flow Ratio Backtest Universe
Price to Free Cash Flow Ratio Backtest Universe


Summary of Results for the P/FCF Ratio Backtest

Backtest Results for the P/FCF Ratio
14-year Backtest Results for the P/FCF Ratio
Chart of the Average annual excess returns from 2000 to 2014 for the P/FCF ratio
Average annual excess returns from 2000 to 2014 for the P/FCF ratio

This backtest of the P/FCF ratio reveals that the first quintile outperforms the S&P 500 Equal Weight Index benchmark. The second through fifth quintiles have lower average annual excess returns than each of the previous quintiles and the overall trend in excess returns is a linear decrease as the P/FCF ratio increases.  These results are as you would expect.  The first two quintiles of the P/FCF ratio backtest outperforms the first two quintiles of the PEG ratio, and the last two quintiles of the P/FCF ratio has lower excess returns than the PEG ratio. Overall, the P/FCF ratio appears to outperform the more complex PEG ratio.

What are your thoughts on the P/FCF ratio?


14 thoughts on “Price to Free Cash Flow Ratio Backtest

  • June 17, 2014 at 9:49 pm

    Would love to see a backtest that combines your most successful ones and contrasts them to the market’s performance; for example, P/FCF and PEG.

  • August 26, 2014 at 4:05 pm

    Am I wrong, or P/FCF backtest yields highest excess returns comparing to all other backtests on this website?

  • December 2, 2014 at 10:03 am

    Is there a way to backtest only 50 or 100 lowest price free cash flow stocks instead of backtesting 5 different quintiles? Trading 600 stocks would not be feasible for anyone.

  • December 2, 2014 at 10:52 pm

    Yes, it is very easy to set the number of stocks in the backtest to 50 or 100 using Portfolio123.

  • December 3, 2014 at 1:12 pm

    Thank you George. I do not have any access to Portfolio123. What would be the results if you only pull the lowest 50 for this ratio? I would be very curious what the returns would look like.

  • December 3, 2014 at 9:26 pm

    Hi serdar,

    I ran the backtest on the lowest 50 for the P/FCF ratio. Here are the results:

    Total Return: 1,667.18%
    Annualized Return: 22.78%
    Max Drawdown: -74.04%
    Sharpe Ratio: 0.72
    Sortino Ratio: 0.94
    Standard Deviation: 26.08%
    R-Squared: 0.36
    Average Excess Return: 19.79%

    The results look pretty impressive and consistent with the bottom 20% bin.

  • December 19, 2014 at 2:19 pm

    Wtf this is insane. It’s ridiculous. Is beating the market really this easy?

  • December 25, 2014 at 6:52 pm

    Have you done a backtest with just cashflow from operations? It’d be interesting to see which one did better.

  • February 3, 2016 at 12:33 pm

    This is great, however, it would be more informative if the comparison line was the universe of stocks you pulled from rather than the S&P 500. Just the stocks you chose, (No OTC, No ADR, minimum $1, etc.) greatly out-performed the S&P as can be seen that even the worse quintile performed better than the S&P

  • February 3, 2016 at 2:59 pm

    The column in the table provides statistics on the “universe” of stocks that were included in the analysis. You can also compare those to quintile returns. The screening tool does not do that step for me, so I took the lazy route and compared results to the equal weight S&P 500.

  • March 18, 2016 at 11:57 am

    This is the most recent past FCF correct? If so, it’s very interesting that you can use past cash flows to find undervalued securities as opposed to estimating future cash flows as is usually expected. I would assume that these companies continue generating similar FCFs in the future and the market adjusts their price upwards? Also, is this FCF to the firm or equity?

  • March 18, 2016 at 1:17 pm

    Yes, I am using trailing 12 month free cash flows in this backtest.

    As for whether it is FCF to firm or equity, it is really not quite either one. It is CFO – capex – dividends. It is probably closest to FCFF.

  • March 19, 2016 at 12:03 am

    Gotcha. Very interesting and helpful to know that you can do okay by focusing on today’s cash flows

  • November 4, 2017 at 7:52 am

    Hi George, interesting perfect backtest a like it.
    I would like to ask you for a favor: as if backtest would apply if only DOW30 companies were applied, low P/FCF (less than 15), these companies hold them for exactly one year, sell them on December 31st of the same year. Yearly reinvesting, Investment period: 2000-2016 years. I have no access to the portfolio123.

    Thank you very much and have nice day

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