Bankroll Formula?

[Rudbaeck]

Actually multitabling will cause a need for a bigger bankroll. Your standard deviation will go up slightly, and your win rate down slightly, due to mistakes and shallow reads. It's nothing near double though.

[Rudbaeck]

[ QUOTE ]
its 300BB standard, not 300BB per table.
1800 is what you need.

Even if you were playing 10 tables 1800 would be your BR.

[/ QUOTE ]

Assuming off course that he adds to his bankroll at a rate of ~3BB/100 and has a pretty low standard deviation 300BB is a decent starting roll.

If you always withdraw at the end of the month leaving yourself with a 300BB bankroll to start the next month with your risk of ruin is damn near 100% given a few years of play.

[J.R.]

I don't believe the sd/100 conversion is linear, unlike the BB/100 conversion. I think you artificially inflated the sd, hence the huge bankroll figure, but.... I hate math.

[Patrick del Poker Grande]

[ QUOTE ]
I don't believe the sd/100 conversion is linear, unlike the BB/100 conversion.

[/ QUOTE ]
That's what I guessed must be wrong with what I did, but what is the conversion? It must be something like k^0.5.

[J.R.]

I'm not sure there is such a formula, at least one that doesn't involve some fun calculus, since the sd isn't (I believe) a linear function.

[Patrick del Poker Grande]

[ QUOTE ]
I'm not sure there is such a formula, at least one that doesn't involve some fun calculus, since the sd isn't (I believe) a linear function.

[/ QUOTE ]
Well then I guess we need to know the formula for SD. I don't remember how to calculate it and I'll be damned if I'm going to take 5 steps over to my bookcase and bust out my statistics book (or google it, apparently). What are the units on SD? Shouldn't it be sqrt(BB^2/hr) or sqrt(BB^2/100) anyway? That would make sense because it makes the units consistent and it fixes my problem with converting to BB/100. Yes. Now that I think of it, if I recall correctly, the units on SD are something like sqrt(something squared/something).

Summary:
The equation is good, but the units on SD are sqrt(BB^2/hr) or sqrt(BB^2/100), not BB/hr or BB/100.

[Timer]

[ QUOTE ]
BR = -(SD^2 * Ln R)/(2 * WR)

BR - Bank Roll
SD - Standard Deviation
R - Your accepted Risk of Ruin
WR - Win Rate


eg. WR = 2 BB/hour, SD = 16 BB/hour R = 0.001 (0.1%)
BR = -(16^2 * Ln 0.001)/(2 * 2)
= 442 BB

[/ QUOTE ]

I'd like to know how you're coming up with the 0.1% risk of ruin. From personal experience that seems awfully small to me.

[Timer]

BR = -(SD^2 * Ln R)/(2 * WR)

What is Ln in this formula, and where can it be found on my scientific calculator?

Thanks.

[AAmaz0n]

[ QUOTE ]
[ QUOTE ]
BR = -(SD^2 * Ln R)/(2 * WR)

BR - Bank Roll
SD - Standard Deviation
R - Your accepted Risk of Ruin
WR - Win Rate

eg. WR = 2 BB/hour, SD = 16 BB/hour R = 0.001 (0.1%)
BR = -(16^2 * Ln 0.001)/(2 * 2)
= 442 BB

[/ QUOTE ]
I have a hard time believing that the units in this formula should be BB/hr instead of BB/100. Is this a typo, or does someone disagree with me?

[/ QUOTE ]

If you use BB/100 for the win rate, then the standard deviation also needs to be expressed in terms of BB/100. Since both numbers will be based on the same number conversion of hands/hour (actually hours/100 hands), the results should be the same either way. Use BB/hr or BB/100, just be consistant and don't mix and match.

Shauna

[mike3076]

THIS ONE IS SIMPLE.
i just hook an I.V. from my bank account to my neteller account. this seems to be adequate for me.