A Rebuy ? for Math Majors

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Well i said that you have to ignore time. EV is unrelated to time spent. So you're not 'throwing away' $8, you're just going to put the $10 to a better use. Think of it as you're playing two seperate tournaments, instead of one and double rebuying.

and, like i said to the other guy.. roi and EV are the same. They both measure your value.


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That doesn't make sense. I think you are inadvertently assuming that the player's total bankroll is $30, which obviously is preposterous.

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Size of bankroll has nothign to do with the EV of a situation.

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I don't know any of the math behind any of this. What I do know is that I play the first hour aggressively (sometimes maniacally) and rebuy every time I bust, because I need a giant stack to survive the second hour and go deep. I don't play outside of my bankroll and I don't play if I can't afford to rebuy.
It seems logical to me that playing a rebuy when you can't rebuy puts you at an automatic disadvantage to everyone else in the tournament.
Since my results support this method I will continue to use it.

[M.B.E.]

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Well i said that you have to ignore time. EV is unrelated to time spent. So you're not 'throwing away' $8, you're just going to put the $10 to a better use.

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But why are you so concerned with "the" $10?

If we are talking about the last $10 in your bankroll, then what you say will make some sense: put it where the EV is highest. But if we are sufficiently bankrolled, then we can spend the $10 on a rebuy today (which is worth $8 of EV) and if we lose that, still spend $10 on tomorrow's tournament (which is worth $10 of EV I think, I forget the numbers in your example).

The point is, this is not an either/or situation. You can do both. If you pass up rebuying today, then you are throwing away $8 of EV (compared to rebuying today, and also entering tomorrow's tournament).

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Think of it as you're playing two seperate tournaments, instead of one and double rebuying.

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But it isn't two separate tournaments.

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and, like i said to the other guy.. roi and EV are the same. They both measure your value.

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DWarrior gives a good explanation of why you are wrong on this point.

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The point is, this is not an either/or situation. You can do both. If you pass up rebuying today, then you are throwing away $8 of EV (compared to rebuying today, and also entering tomorrow's tournament).

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I agree, i think i got off sounded like it was a strategy post, and it's completly not, Theres no reason to pass up the $8, i agree. I was just kinda surprised when i realized that it wouldn't be the absolute best way to spend your money.
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And again with the ROI/EV thing, it's not like division/subtraction it's like inches/feet. They both measure your value in a tournament, And to convert to one or the other you just devide/multiply by the buyin of the tournament.

While i see what you're saying, adn i back down a bit from arguing, they're still pretty much the same thing. Also, it has no effect on my main argument.

Building a stack does not guarantee getting you to the money in a rebuy. Getting to the bubble is a four hour ordeal. By that time the blinds are 1500/3000 plus antes. What determines how you do in rebuys is how you play for the next 3 hours after the rebuy period. If I have 5000K chips at then end of the first hour, I can make the money by playing good and finish ahead of the bad players who accumulate chips to make up for how bad they will play after the rebuy period. I loosen up a little during the rebuy, but not too much. I maximize my return by doubling against loose players in the first hour and not having to pay more than the original buyin plus a rebuy and add on. Of course sometimes I lose and need to rebuy, but I don't just push on every hand. I don't need a formula for this.