A few months ago, possibly longer, someone enquired as to whether I still had my articles on Elo Ratings in Football available. These were initially published around 2012 on the Betting Expert website, but don't appear to be available any longer.
At the time I responded that I didn't have them, since I couldn't find them anywhere, but while researching the logarithmic method of removing bookmakers' margin from prices at the weekend, I came across the Elo Ratings articles.
Originally written as a four part series, these are now published as one post here, and while they are somewhat dated now, it's interesting to look back on and see how some of my basic ideas from back then are now, albeit with significant enhancements, now mainstream with the xG revolution.
Sunday, 25 September 2022
'Elo Again
Tuesday, 20 September 2022
Big Line, Low Total
College Football isn't everyone's cup of tea, and unless you have access to the US sportsbooks, it can be hit or miss as to whether games are available, but there was an interesting Tweet on Friday:
The basic philosophy was that low-scoring games would have a more narrow range of potential outcomes, and this would disproportionately benefit the team getting points.
Monday, 19 September 2022
Podcasts, Drinking, Dolphins and Augsburg
I mentioned a few podcasts a couple of weeks ago and Nfletch added one to the list that is worth mentioning:
Risk of Ruin is a great one. Not purely betting but great interviews from people with long careers in investing/gambling/betting space.
Unfortunately, there is a small downside to all these excellent suggestions, which is that because I typically listen to them while out for my daily walk, when something comes up that is of particular interest, I have to make a mental note to listen to the episode again when I'm at home and in front of the computer.
I like to do a longer walk at the weekend, and on Saturday covered 13+ miles while mostly listening to the two suggestions below from a 'Sacred Manuscript' subscriber who wrote:
Thanks for adding these Bundesliga systems. Hopefully you’ve got some more little nuggets up your sleeve to add to the Sacred Manuscript 😀They were both very interesting episodes, and hopefully there will be more with Ed Thorpe to come. I do like Tim Ferriss, but hadn't listened to him in a while.
If you haven’t already heard them I think you will really enjoy the following 2 podcasts with Ed Thorpe. Absolutely amazing how sharp this man is at 89 years young.
https://podcasts.apple.com/gb/podcast/the-tim-ferriss-show/id863897795?i=1000563807699
https://podcasts.apple.com/gb/podcast/the-tim-ferriss-show/id863897795?i=1000568020919
Ed isn't a big drinker, and mentioned that he only started drinking (a little) beer a few years ago following a visit to the Guinness Storehouse in Dublin. He now drinks half a beer two or three times a week, which is a little less than myself and probably the main reason why he is his ideal weight and I am not.
The data isn't perfect, but on the left is how my weight over the past three years has fluctuated following a dry day compared to a drinking day.
If I don't have a drink, on average I will lose almost 0.4lbs a day, which doesn't sound like much, but it adds up quickly over time.
After a drinking day, weight the next day tends to be unreliable, I suspect due to dehydration, but looking at the weight two days on and there's a linear increase in weight gain depending on the massiveness of the session.
Anyway, moving on to sports betting and Week 2 was a much better NFL weekend than opening week, with all three selections covering, and two winning outright taking the season record to 4-3.
Thursday, 15 September 2022
Dodgers Coasting
The past weekend was, like the curate's egg, good in parts. With no EPL games, the focus for many readers was probably American Football and the opening weekend of the NFL.
Friday, 9 September 2022
Pitch Clocks And Big Bases
Clearly the universal adoption of the Designated Hitter rule was always likely to have an impact on Totals betting, but the Money Line and Run Line markets also appear to have been disrupted.
It's going to get worse. News out today reveals that the 2023 season will see 'sweeping changes' as MLB look to shorten games as well as increase 'offense'.
MLB will be adopting a pitch clock (15/20 seconds depending on whether the bases are empty or not). As The Guardian reports, in minor league trials, a pitch clock...
"has helped reduce the average time of a nine-inning game from 3hr 4min in 2021 to 2hr 38min this season. The average time of a nine-inning game in the major leagues this year is 3hr 6min; it was 2hr 46min in 1989, according to the Elias Sports Bureau."
In the last pre-clock season (1953–54), teams averaged 79 points per game; in the first year with the clock (1954–55), the average was 93 points, which went up to 107 points by its fourth year in use (1957–58). The advent of the shot clock (and the resulting increase in scoring) coincided with an increase in attendance, which increased 40% within a few years to an average of 4,800 per game.
In the first year of the three point field goal, there was an average of 0.8 scored per game from 2.8 attempts per team, with this increasing up to last season's 12.4 scored from 35.2 attempts.
Teams adapt to rule changes and bettors need to also.
Monday, 5 September 2022
Podcasts and Compliments
P.S. I managed to bet on the William and Mary NCAA match, so that's another Sacred Manuscript subscriber you can add to the list of people who got on board.
Hopefully there will be a few useful recommendations in there, and it may go some small way towards repaying the debt we all owe to you for the continuously excellent blog.
Hello again, Cassini.Thanks for the mention, glad my comment was of interest. The Bet the Process podcast is certainly worth a listen, particularly when a guest is interviewed. It tends to focus a fair bit on NFL or NCAAF during the course of the season, and if you can get past the occasionally disjointed conversation flow between Rufus and Jeff I’m sure the miles will fly by.It’s rumoured that one is never more than six feet away from a podcast recommendation nowadays, but for what it’s worth I have found the following well worth a go:Be Better Bettors -Spanky does seem to divide opinion in the Twitter betting world, but his podcast is decent, and due to being very well connected he seems to get a few guests that don’t appear elsewhere.Circles Off -I’ve just started this one from the beginning. I’ve listened to co-host Rob Pizzola on various podcasts previously, and he obviously knows the time of day. A decent array of guests too.Business of Betting -Recently relaunched with a different host, some interesting guests on the earlier episode, and previous host Jake had a very easy interviewing style.Inside Betting -A sporadic offering from Matthew Trenhaile. A shame it never really gained any traction at the time (I myself only found out about it well after the final episode) but Matthew is incredibly interesting, and clearly very knowledgeable.The Bashcast -This is a hidden gem. An abundance of information on modelling soccer based on xG, via the correct score market (amongst many other useful nuggets). Really, really worth a listen.The Business We’ve Chosen -Back across the pond for the final suggestion. This pod is pretty no-nonsense, and not shy of throwing shade at most of Gambling Twitter.Not many episodes, but some are quite lengthy, and another where the guest line-up is pretty unique.If you’re already familiar with some or all of the above, feel free to ignore.
Hopefully there will be a few useful recommendations in there, and it may go some small way towards repaying the debt we all owe to you for the continuously excellent blog.Kind regards,Jason
Saturday, 3 September 2022
William, Mary and Charlotte
It was a winning start to the College Football season last night with William and Mary not needing the 4 points they were getting to beat Charlotte.
Friday, 2 September 2022
Smokey The Square
As some of you may have seen, I recently spotted a Tweet containing what I was fairly sure was some rather poor advice.
This is very poor advice.
With almost 19 seasons of data, blindly backing the Los Angeles Dodgers when favourite has a positive ROI from more than 2200 matches.
If the 'tip' had specified 'Away / Road favourites' it would have had some merit (the Yankees are actually the worst team to back in this situation), but at home, these two clubs are actually the best of the 30 clubs to back when favourites.
When faced with these facts, the first response was this:
Who said anything about "winning records"? My response clearly referenced ROI so again, I very politely suggested that Smokey:I should have said "are positive" but as I said, we all make mistakes. The response this time made it quite apparent that we were dealing with SmokeytheSquare:What?! Presumably he later realised the error, and it's no wonder he deleted his Tweets.The answer is that, for Smokey, the 'long run' is a season. It's probably not the definition most readers will have of a 'long run', but so be it.
How true was the statement that if you bet both those teams consistently [to level stakes] you'll lose over a season?
Not very. Profitable each of the last four seasons:
As for the other two "tips"?
Number 1 makes sense. Squares tend to like Home teams and winning teams, so if there is any value, the first place to look would be Away teams with losing records.Rufus, Hedging, and Oxford Coma
This blog doesn't get too many comments, so it was rather remiss of me not to mention one from Jason regarding my Risk Is Personal post a few days ago.
Hi Cassini, This (very loosely) reminded me of a podcast I listened to recently, on the subject of hedging. Not sure if you're a listener to the Bet The Process podcast, but within the last couple of months (Season 5 Episode 32) there was a discussion on whether to hedge out of a bet even if the hedge itself is a bad value bet. At around 25 minutes in the discussion covers the use of Kelly in relation to hedging out of a bet, even at a negative edge, when considering what you stand to win in relation to your bankroll/personal wealth. I can't really comment on the maths (although I'm sure you can), but thought it might be of interest when considering the follow-up poll referenced in your piece (where the responders are asked to consider the effect of net worth on their choice between red and green). Hope this is of some interest to you. All the best, Jason
I found the podcast in question, and it's well worth a listen. Tying a couple of former posts together, and I mentioned here that my 100 miles every month goal was in jeopardy.
Additionally, and while less of a factor than calories ingested, my exercise routine has also been significantly disrupted and my monthly goal of 100 miles on foot is in serious danger of being missed for the first time since November's feeble 93 miles.
Fortunately listening to podcasts is a great way to pass the time and learn something new, and I ended up at 115.9 miles with one of those hours spent listening to Rufus and Jeff discussing hedging and Kelly as Jason describes.
Rufus Peabody is a betting person I respect a lot, and I've mentioned him several times in this blog, including recommending a podcast he did for Pinnacle Sports a little over three years ago. He also led me to the excellent book The Logic of Sports Betting by Ed Miller and Matthew Davidow which you should definitely read if you are serious about being profitable in sports betting.
Back to hedging out of a bet, even at negative value, the premise was this. You make a bet at fairly long odds, and are lucky enough to find yourself in a very good position.
I thought I'd written about this before using the example of backing a small team to win the FA Cup pre-season (say Oxford United), going into a coma, before awakening on the eve of the Cup Final to find that they are playing Crystal Palace. (One can dream).
The £100 bet was placed at 1000-1, and Oxford are now available at 2.75 to lift the Cup. Palace are just 1.35 to win their first proper major trophy, but their fair odds are really more like 1.5.The question is should you let your bet run or hedge out by backing Palace, even if that latter option is poor value?
The answer is "it depends".
If you are Warren Buffett (who just turned 92 by the way), £100,000 is nothing, and you should let the bet ride rather than take bad value, but what if you are someone to whom that sum would be rather significant, and you were a lot younger than 92?
This is a situation (an extreme one admittedly) where you would almost certainly lock in at least some profit whatever the outcome. Yes, you'd be giving away value, but in the same way that your insurance premium isn't an accurate reflection of the true risk, sometimes insurance helps you sleep. Though if you've been in a coma for nine months, you're probably done with sleep for a while!
Rufus describes the real world example discussed on the podcast here, and this is also well worth spending some time on. His conclusion is this:
Psychological Considerations of Hedge Betting
Hedge betting is very difficult for some people, because of regret. If you don’t hedge a potential big payday, and the bet ends up losing, you kick yourself for not hedging. If you hedge and the original bet won, you kick yourself for hedging.
Have a process for making these decisions. I have no regret for not hedging my Mito Pereira outrights, because I knew hedging was not the optimal decision. Were my bankroll smaller, I 100% would have tried to hedge (and definitely not regretted it), because it would have been the optimal decision. “Professionals don’t hedge so I shouldn’t” is a huge load of bull. Every situation is different. You can’t paint this decision in broad strokes.
It’s about having a process that you stick to. Whether to hedge isn’t a decision you have to make – the decision has already been made for you. You know what the optimal decision is. You just need to not f*** it up. Whether or not it works out in one instance is immaterial. Your process was good, and in the long run you are putting yourself in the best position to succeed.
Thanks for the comment Jason, and I'll probably listen to a few more episodes of Bet The Process as I try to get back on track to average 5 miles a day for the year. I'm currently at 4.917 should you be wondering.