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A Fantasy Sports Wizard's Winning Formula

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11–20 of 41 posts

Re: A Fantasy Sports Wizard's Winning Formula

#11

I have never understood why daily games are legal. The outcomes can be determined by random events like injuries or the weather. How is this not gambling?

It is certainly gambling, but it's explicitly legal under certain conditions per the UIGEA. And there is definitely a skill component as well.

Re: A Fantasy Sports Wizard's Winning Formula

#12

I have never understood why daily games are legal. The outcomes can be determined by random events like injuries or the weather. How is this not gambling?

There were exemptions for fantasy sports made under the Unlawful Internet Gaming Enforcement Act. Basically, it's legal to 'gamble' on fantasy sports given the following conditions:

1. The prizes offered are established ahead of time (fixed prize pool, most sites implement this by capping the number of entries - and covering any overlay if not enough people enter)

2. The scoring is based on statistical results in multiple-real world games (none of the DFS sites allow you to 'bet' on a single games - the players must come from a pool of at least two NFL games)

3. Can't make "traditional bets" (spread, over/under)

(And less revelant to most people, you can't play fantasy for money if you are an member of the team - i.e. athletes can't 'bet' on themselves)

Re: A Fantasy Sports Wizard's Winning Formula

#13

I have never understood why daily games are legal. The outcomes can be determined by random events like injuries or the weather. How is this not gambling?

They are legal because the courts and legislation(such as the UIGEA) have deemed them to be legal.

I don't understand what seems to be a distinction between daily games and season-long leagues. Season-long outcomes are affected by injuries and other random factors as well(just ask anyone who drafted Adrian Peterson with their first pick this year).

Re: A Fantasy Sports Wizard's Winning Formula

#14
post #6

Earlier quoted context omitted.

You'll surely be more efficient with handling data, but you don't have digital access to all the data you'd need. For example, the chance that a player plays at all (if they are in questionable health) is one of the most important signals. But you can't just write a regression from past data on that player/team/coach. An intuitive guess from reading several media reports will be far for accurate. This guy is surely m…

> You'll surely be more efficient with handling data, but you don't have digital access to all the data you'd need. It occurs to me that collating said data in an accessible format for a modest fee would be a pretty good low hanging fruit business idea. I'm sure there must be something like that out there but last time I looked into this, 2-3 years ago, I couldn't even get the NBA schedule in JSON or some other progr…

Everything old is new again

http://en.wikipedia.org/wiki/STATS_LLC

"STATS LLC is a global sports statistics and information company – the company name originated as an acronym for "Sports Team Analysis and Tracking Systems". It was founded on April 30, 1981[1] by John Dewan,[2] who became the company's CEO. STATS was an outgrowth of the grassroots non-profit Project Scoresheet, a volunteer network created to collect baseball statistics, prompted by a suggestion made by Bill James, who later joined STATS for a time. In 1987, STATS developed a reporter network for Major League Baseball and provided research for NBC's postseason baseball coverage, and by 1989 was doing the same for ESPN's broadcasts.[1]"

Re: A Fantasy Sports Wizard's Winning Formula

#16
I have a lot of knowledge of advanced baseball statistic analysis, and played about $100 per day this year during the season, making a profit of ~$2000. This is my third straight winning season, but the first where I actually wrote code that spat out lineups.

I spent no money on data, everything you need is available for free.

If anyone has advanced knowledge of other sports and wants to collaborate, send me an email or tweet. Contact info in profile.

Here are my 2014 MLB results from Fanduel, the site I spent the majority of my time on:

  Entered  $15,128.00
  Won	   $17,022.04
  Profit   $1,894.04
  ROI      12.52%
Data: https://docs.google.com/spreadsheets/d/1rN8vhO1nZlojF-wiFSgq...

Re: A Fantasy Sports Wizard's Winning Formula

#17
This is a tough business to win as a player. The house is taking 8 - 10% rake meaning you have to have a 60% winning percentage just to break even. Much better business to be the house. Even if 30% of the players are highly skilled handicappers it's going to be very hard to consistently win this game. Sounds like fun to play, but as in all gambling enterprises, the real money comes from operating the casino, not playing there.

When I heard the fan duel ads on the radio and then saw it on ESPN, I couldn't believe that it was legal. Then I saw the law with the exception for fantasy sports and I was just super jealous of these legal sports book operators. Running an online sports book is like having a free money machine.

Re: A Fantasy Sports Wizard's Winning Formula

#18

I have a lot of knowledge of advanced baseball statistic analysis, and played about $100 per day this year during the season, making a profit of ~$2000. This is my third straight winning season, but the first where I actually wrote code that spat out lineups. I spent no money on data, everything you need is available for free. If anyone has advanced knowledge of other sports and wants to collaborate, send me an email…

Interesting...I tried doing machine learning for daily fantasy baseball and it just didn't work. I wrote a scraper that put Fanduel results and contest payout structures into a database, then backtested against thousands of contests to see where I would have wound up had I played in those contests using projections from the machine learning algorithm. I figured I would eventually make the algorithm profitable. Unfortunately I was wrong. I couldn't find any combination of data to feed into the algorithm that consistently put me in the green. At least I wasn't actually playing and losing money.

I finally gave up after a few months. The scraper data was fascinating though....there were a few players consistently yielding 80%+ ROI across hundreds of entries.

Re: A Fantasy Sports Wizard's Winning Formula

#19
post #17

This is a tough business to win as a player. The house is taking 8 - 10% rake meaning you have to have a 60% winning percentage just to break even. Much better business to be the house. Even if 30% of the players are highly skilled handicappers it's going to be very hard to consistently win this game. Sounds like fun to play, but as in all gambling enterprises, the real money comes from operating the casino, not play…

The rake is definitely unsustainable. Currently, its negative effects are masked by an influx of new players (Fanduel is growing roughly 300% per year [1]). But when that growth slows, the only people left to be ground into dust by the rake will be the longer-term player pool that once feasted on new players. One by one, they will lose their entire bankrolls, until the whole model collapses. They will eventually lower it, but it will almost certainly be too late by then.

[1] http://fanduel.com/investors

Re: A Fantasy Sports Wizard's Winning Formula

#20
post #17

This is a tough business to win as a player. The house is taking 8 - 10% rake meaning you have to have a 60% winning percentage just to break even. Much better business to be the house. Even if 30% of the players are highly skilled handicappers it's going to be very hard to consistently win this game. Sounds like fun to play, but as in all gambling enterprises, the real money comes from operating the casino, not play…

> The house is taking 8 - 10% rake meaning you have to have a 60% winning percentage just to break even.

That's only correct in a constant sized market. In a growing market with lots of new money coming in, its much easier to win. When growth stops, it becomes much more difficult. The vast majority of remaining players start losing, only the house (and maybe a couple sharks) can win consistently. Assuming a market in continual decline, eventually everyone loses (except the house).

Nate Silver devotes a chapter to this in The Signal and the Noise. He goes through the numbers, anecdotally supported by his experience during the online poker boom.

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