The kelly package implements (very) fast Kelly staking calculations for a range of scenarios
that currently include:
- Backing and laying
- Any number of outcomes
Scenarios to be covered in the near future include:
- Placing more than one bet simultaneously
- Betting on events that have more than one winner
Requires Python 3.7 or above
pip install git+https://github.com/mberk/kelly.git
>>> kelly.calculate_kelly_stake?
Signature:
kelly.calculate_kelly_stake(
price,
is_back,
probability,
other_probabilities,
position,
other_positions,
bankroll,
kelly_fraction=1.0,
verbose=False,
)
Docstring:
Calculate the optimal fractional Kelly stake when placing a single bet on an event that has one winner
:param price: The price at which the bet is being placed
:param is_back: Whether you are backing (True) or laying (False)
:param probability: Your fair probability for the outcome you are betting on
:param other_probabilities: A list of probabilities for the other possible outcomes. sum(other_probabilities) + probability should be equal to 1 subject to floating-point error but this is not yet enforced
:param position: Your position - i.e. how much you are currently standing to win or lose - on the outcome you are betting on
:param other_positions: A list of positions corresponding to the other possible outcomes. It is assumed there is a 1:1 correspondence between the elements of this list and other_probabilities
:param bankroll: Your notional Kelly bankroll
:param kelly_fraction: A fraction to multiply the optimal stake by. Defaults to 1
:param verbose: Whether to generate log statements when numerically optimising the stake. Defaults to False
:return: The optimal fractional Kelly stake
Type: builtin_function_or_method
Coming soon...