Question About Kelly Criterion and Flat Betting

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  • ABanks
    SBR Rookie
    • 05-16-11
    • 30

    #1
    Question About Kelly Criterion and Flat Betting
    I watched Justin's video explaining Kelly Criterion and how it applies to sports betting but I can't seem to figure out how to apply it to what I am doing. If I am planning on betting an entire MLB season and I know I am going to make 500 bets and that my return on investment/return on risk/edge (however you want to define it) is going to be 2% for the entire season, how do I figure out how much each bet should be if I plan on making each bet the same size and my bankroll is say 30,000 dollars?

    How would I use the Kelly formula to figure out my optimal bet size? I was running into problems trying to plug in the win probability and payout on bet, among other things. (I don't have great math abilities) I would like to be able to have a formula so I could plug in different bankroll amounts and r.o.i. percentages and see what the optimal bet sizes would be for them.

    If anyone who understands Kelly and is good with math could help me out with this it would be much appreciated.
  • tukkk
    SBR Sharp
    • 10-04-10
    • 391

    #2
    optimal wager = edge/(decimal odds-1)
    Comment
    • blanda
      SBR Wise Guy
      • 12-18-09
      • 728

      #3
      Kelly Kelly is the best Kelly...
      Comment
      • LT Profits
        SBR Aristocracy
        • 10-27-06
        • 90963

        #4
        Just bet TO WIN 2% of your bankroll every play.
        Comment
        • ABanks
          SBR Rookie
          • 05-16-11
          • 30

          #5
          Oh ok, thanks.
          Comment
          • Sawyer
            SBR Hall of Famer
            • 06-01-09
            • 7734

            #6
            Flat is better then Kelly.

            Kelly Kamikaze Criterion sucks.
            Comment
            • jgilmartin
              SBR MVP
              • 03-31-09
              • 1119

              #7
              Have you tried this?
              Sports betting and handicapping forum: discuss picks, odds, and predictions for upcoming games and results on latest bets.


              If you read the text below the calculator, it explains how it all works pretty well, IMO.

              If you can accurately determine your edge, Kelly is absolutely, positively the optimal method.
              Comment
              • ABanks
                SBR Rookie
                • 05-16-11
                • 30

                #8
                Thanks, I will check it out.
                Comment
                • wiffle
                  SBR Wise Guy
                  • 07-07-10
                  • 610

                  #9
                  Originally posted by Sawyer
                  Flat is better then Kelly.

                  Kelly Kamikaze Criterion sucks.

                  lollercoaster
                  Comment
                  • Thremp
                    SBR MVP
                    • 07-23-07
                    • 2067

                    #10
                    Originally posted by Sawyer
                    Flat is better then Kelly. Kelly Kamikaze Criterion sucks.
                    This has been proven an idiotic comment time and time again.
                    Comment
                    • That Foreign Guy
                      SBR Sharp
                      • 07-18-10
                      • 432

                      #11
                      For most of the people that make that kind of statement flat betting 0 is better than betting Kelly on their perceived edge.
                      Comment
                      • durito
                        SBR Posting Legend
                        • 07-03-06
                        • 13173

                        #12
                        Originally posted by Sawyer
                        Flat is better then Kelly.

                        Kelly Kamikaze Criterion sucks.
                        You have been a "pro" for three years and your bankroll is under 30k.
                        Comment
                        • byronbb
                          SBR MVP
                          • 11-13-08
                          • 3067

                          #13
                          use this:


                          it gives you a bunch of excel functions useful for sportsbetting. if you can't get it to work then do something else with your time.
                          Comment
                          • sharpcircle
                            SBR Sharp
                            • 02-05-11
                            • 308

                            #14
                            Bet kelly if you know your edge, flat bet because you most likely don't
                            Comment
                            • maxvalue1
                              SBR Sharp
                              • 11-08-10
                              • 350

                              #15
                              key words...know your edge
                              Comment
                              • Ruifgalmeida
                                SBR MVP
                                • 04-23-08
                                • 2024

                                #16
                                Originally posted by sharpcircle
                                Bet kelly if you know your edge, flat bet because you most likely don't
                                The best post in this thread.
                                Not everybody can calculate their edge( like myself) ,in this case flat betting will work a lot better
                                Comment
                                • tukkk
                                  SBR Sharp
                                  • 10-04-10
                                  • 391

                                  #17
                                  Originally posted by Ruifgalmeida
                                  The best post in this thread.
                                  Not everybody can calculate their edge( like myself) ,in this case flat betting will work a lot better
                                  Improving to the level, where you can calculate your edge, will work a lot better
                                  Comment
                                  • Pancho sanza
                                    SBR Sharp
                                    • 10-18-07
                                    • 386

                                    #18
                                    If your grasp on what your edge is so poor that you have to resort to flat betting, there's a good chance you don't even have an edge.
                                    Comment
                                    • maxvalue1
                                      SBR Sharp
                                      • 11-08-10
                                      • 350

                                      #19
                                      do you have a link to Justin's video explaining Kelly Criterion ?
                                      Comment
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