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calculateMoneyRatio: use share value amount

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This commit is contained in:
mantikoros 2022-01-14 11:35:32 -06:00
parent 520fd5d48e
commit 3805adff58
1 changed files with 5 additions and 4 deletions
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9
common/calculate.ts
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@ -68,9 +68,8 @@ export function calculateRawShareValue(
return currentValue - postSaleValue
}
export function calculateMoneyRatio(contract: Contract, bet: Bet) {
export function calculateMoneyRatio(contract: Contract, amount: number) {
const { totalShares, pool } = contract
const { amount } = bet
const p = getProbability(totalShares)
@ -79,7 +78,9 @@ export function calculateMoneyRatio(contract: Contract, bet: Bet) {
const expected =
p * contract.totalBets.YES + (1 - p) * contract.totalBets.NO - amount
return expected <= 0 ? 0 : actual / expected
if (actual <= 0 || expected <= 0) return 0
return actual / expected
}
export function calculateShareValue(contract: Contract, bet: Bet) {
@ -88,7 +89,7 @@ export function calculateShareValue(contract: Contract, bet: Bet) {
bet.shares,
bet.outcome
)
const f = calculateMoneyRatio(contract, bet)
const f = calculateMoneyRatio(contract, shareValue)
const myPool = contract.pool[bet.outcome]
const adjShareValue = Math.min(Math.min(1, f) * shareValue, myPool)