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Sports Betting as an Investment - Dr. Bob Sports
Section 1: Sports Betting as an Investment Making Money by Betting on Sports Most people think that sports betting at is about finding ‘sure things,’ but in reality such ‘locks’ are nothing more than gamblers’ fancy. Just as in real estate, currency, stocks, or any other speculative market...
drbobsports.com
"Section 1: Sports Betting as an Investment
Making Money by Betting on Sports
Most people think that sports betting is about finding ‘sure things,’ but in reality such ‘locks’ are nothing more than gamblers’ fancy. Just as in real estate, currency, stocks, or any other speculative market, ‘sure things’ simply do not exist. As a professional sports bettor, my goal is to find and exploit many small edges over a long period of time to earn a compounding return. Winning 55% of games is very significant, and with very conservative bet sizing, you can grow your return very quickly. Investing $10,000 into the stock market for a year and earning a 10% return is considered a great investment – but your return winning a modest 54% of your sports bets would trounce that return.My picks have yielded a much higher risk adjusted return than the stock market. Obviously, the variance from season to season is formidable, but as anyone who had a significant amount invested in stocks or real estate in 2008 can tell you, such swings aren’t limited to sports. In the long run, my edge in what I do is far greater than the edge that you could hope to gain in any other speculative market.
Juice, and the power of 55%
Even though most sports bettors are losers in their own right (as a whole, bettors actually win an average of only 48% of their bets – less than they would expect to win if they just flipped a coin for every game), their losses are compounded by the fact that the house takes a cut of winnings, also known as the ‘juice’ or ‘vig.’ Most sports books charge a 10% commission on wins, which means that a bettor must actually win 52.4% of his games just to break even. (Wagering $100 per game, a bettor loses $100 with a loss and wins $90.91 with a win, so he must go 11-10 (11/21 = 52.38%) to break even).In order to beat the juice and win in sports betting, a bettor must employ a disciplined approach in their analysis of each game using methods that have proven to be successful in the long run. I discuss my math models and analytical metrics in my Handicapping Methods essay, but you must realize that only the best and most knowledgeable handicappers can win more than 52.4% of their games. In their 2007 two page article about my handicapping success, the Wall Street Journal wrote, “…fewer than 100 people can sustain (win rates of 55%) over time. Most of them belong to professional betting syndicates that hire teams of statisticians, wager millions every week and keep their operations secret.”
Touts often claim to be able to hit 60% or higher, but as I explain in my essay on Bayesian Probability, anyone who tells you that their long term expected winning percentage is higher than 60% is deluding themselves. Ten or more years ago a sharp handicapper could win about 60% long term but those days are over, as odds makers have become more savvy in the past decade or so. For a bettor to claim a greater than 60% long term expected win percentage, that would be mean that Vegas would have to consistently release lines with egregious errors, and that simply just does not happen often enough nowadays for claims of a greater than 60% long term expected win percentage. Any short term win rates of around 60% or higher are simply due to blind, short-term luck. For instance, last year (2016) in the first season using a new NFL play-by-play model, Dr. Bob Sports’ NFL Best Bet sides were an incredible 66-26 (71.7%), but that record was enhanced by winning a very large percentage of close games (31-12 on Best Bets decided by 7 points or less) rather than splitting the close ones. It still would have been a great season on NFL Best Bet sides (62%) if the close games had been 50% but I still can’t expect the new model to win 60%-plus on sides based on that one season – although the play-by-play model back-tested at a very profitable 56% winners.
I often hear amateur gamblers erroneously claim that winning 55% of games isn’t even enough to beat juice. As demonstrated above, a bettor only needs to win 52.4% to break even, and a 55% bettor will be very profitable in the long run if they pursue an optimal money management strategy.
Of course, as in any game of chance, there is variability in the actual results and just because you have won 55% in the past and expect to win 55% in the future doesn’t mean that you’re going to win 55% this upcoming season. There is variance in sports betting, as there is in most investments, and I calculate the standard deviation to figure out how much of my bankroll I can safely wager on each game during the season to accommodate potential negative swings while having very little chance of exhausting my bankroll. I have extensively quantified the variance that exists in sports betting, and use mathematical formulas to dictate the exact optimal amount to invest so as to maximize the ratio of profits to variance.
My long term percentage on College Football Best Bets is 56% (1290-1017-40 over 29 years) and the new NFL play-by play model was 100-69 (59.2%) in 2016. However, despite being a combined 148-107 (58.0%) on Football Best Bets, college and NFL, in 2016, I will continue to use 55% winners as a realistic goal going forward. If I expect 55% on 200 Football Best Bets (I had 255 last year, which was higher than expected) then the expected profit at -110 odds would be 200 x (0.55 – (1.1 x 0.45), which is +11.0 units (or +22.0 Stars if my average Best Bet is rated 2-Stars). The Kelly Criterion recommends a wager of 3.4% of your bankroll for a wager with a 55% chance of winning and odds of -110. However, the Kelly formula assumes sequential betting and sports betting usually involves simultaneous betting, which is part of the reason behind using some fraction of full Kelly to reduce risk. If I play 2.0% of my initial bankroll per bet, or 1.0% per Star, (i.e. flat betting) then my expected return during football season (5 months) is 22.0%. Adjusting your bankroll after each week rather than flat betting will increase your expected return, as explained in the KC simulation section of my money management section.
A basketball season with 53.5% winners (my career percentage is 53.9%) on 500 bets would on average yield +11.75 units ( (500*.535) – (500*.465)*1.1 ), or +23.5 Stars if my average Best Bet is rated 2-Stars. Using a conservative 1.6% of bankroll per bet (full Kelly at 53.5% at -110 odds is 2.35% of bankroll), or 0.8% per Star, results in an expected return of 18.8%. So, despite a lower overall winning percentage and smaller average wager size, a season’s worth of basketball wagers is fairly comparable to a season of football because there are so many more Best Bets in basketball season.
The NBA Guru Basketball service has achieved even higher returns in the 5 seasons that the Guru has been with Dr Bob Sports. The NBA Guru has an incredible record of 647-532-20 (54.9%) on his Best Bets over 5 seasons and 1366-1118-41 on a Star Basis for +136.0 Stars (with an extra -0.2 for added juice), which is an average of +27.2 Stars per season. You can risk more of your bankroll per play with the NBA Guru because he has a higher win percentage and fewer plays. I recommend 2.0% of your bankroll per play, or 1.0% per Star on NBA Guru Best Bets.
Money Management
Money Management is as critical to a sports investor as picking winners. I have devoted many hours of careful analysis and math to optimal money management systems, which I have painstakingly outlined in my Money Management articles. Sports betting is more high risk (higher volatility and standard deviation of return) than stocks, but also results in a higher return if you follow a proven long term winning handicapper (of which there are very few).My Money Management articles outline how to adjust your bet sizing based on your goals (expected return vs. probability of positive returns), your investment length (one season or many), your growth preference (flat or compounding), your risk tolerance (high or low) and the proportion of your overall bankroll which is made up by sports betting.
It is always better to set conservative expectations to avoid over betting.
Factoring in the Cost of my Service"
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Sports Betting as an Investment - Dr. Bob Sports
Section 1: Sports Betting as an Investment Making Money by Betting on Sports Most people think that sports betting at is about finding ‘sure things,’ but in reality such ‘locks’ are nothing more than gamblers’ fancy. Just as in real estate, currency, stocks, or any other speculative market...
drbobsports.com