Quote Originally Posted by andarmac99:
I've always risked the same percentage on 95% of my bets for as long as I can remember. It's just the way I have always done it, same amount whether on a dog or fav. My strategy for each sport is to come in with a certain bankroll for that season and 95% of the time bet the same amount each bet no matter the line. I am controlled but very aggressive and I am fully prepared to lose the full amount I come into the season with. In hockey I bet 5% of my
original bankroll on each bet. Early in the season I could have nearly 50% of my designated hockey bankroll in play on any given night. In NFL I bet 7.5% on each bet in the regular season and preseason, going to 10% for the playoffs. If not for a good preseason I would have been over halfway to losing my NFL bankroll this year but that is OK. I don't do this for a living or bet huge amounts and I don't pretend to.
Sounds foolish but I have yet to read up on the Kelly system. So I can't really comment on your strategy. I would like to look into it some though as I think I am probably not squeezing out every penny the way I'm doing it now but I barely have enough time to bet the games right now so I don't see it happening soon.

In a nutshell, the Kelly criterion is
1 - w
a = w - --------- , where a is the optimal % of bankroll to be wagered,
p
w is the expected win %, and p is the profit per $1 wagered, if the bet wins
The Kelly criteria prolongs the life of your bankroll because if you're on a bad run, the size of your bets decrease as your bankroll decreases. If you're on a good run, the size of your bets increase exponentially. If you hit very close to, at, or above your expected win % over the course of a season, you will do very well.
If you do poorly, you'll go longer before tapping out, giving you a chance to recover. Where the Kelly won't do well, relative to flat betting, is in that "middle ground." That's why its important to be careful in deciding on the expected win % to use in the equation. Its better to be conservative than it is to be overly optimistic, because the higher you set your expected win %, the higher your break-even % will be, and the wider that " middle ground" will be.
Another nice feature of the Kelly, if done properly, is that if you hit a given win % over the course of the season, your outcome at the end of the season will be the same regardless of the order of your wins and losses. The key is that its done properly. meaning readjusting your bankroll after every outcome. How do you do this,
you say, when the games you're betting are being played concurrently, or when you want to make more than one bet at a given moment in time to lock in the existing lines? You use what I call "self-adjusting parlays." A portion of your bets need to be put into parlays. Another forum has a tool called the Kelly calculator which can assist with this.
When you are making 4 or 5 or more (or any number greater than one, for that matter) simultaneous wagers, you'll have less money in play than otherwise. The "self-adjusting parlays" appro-
priately adjust the amount riding on each game, Go 4-1 or 5-0 and you'll see the benefits.
Using the Kelly when you're making simultaneous wagers can definitely be complicated at first, but it becomes easier once you get the routine down.
Another use of the Kelly equation which shouldn't be over- looked, and which I alluded to in my previous post, is to compare two or more different bets, and determine which bet calls for the larger wager; if you know p and can estimate w.
Nice intro for you if you ever consider looking into it further.