fb-wash-0002
{
"shares_sold": 250,
"sale_proceeds_per_share": 18.4,
"basis_per_share": 25.15,
"replacement_shares_in_window": 100,
"facts": "The account sells 250 shares of ABC at a loss and repurchases 100 shares of ABC eight days later. No other acquisitions of ABC occur within the 61-day window. The taxpayer is not a dealer."
}How many dollars of the realized loss are disallowed under section 1091? Respond with the numeric amount only.
675 USD (tolerance ±0.01)
Produced by compute washsale.disallowed-loss in src/lib/fiduciarybench/keys/index.ts — the stored value is machine-checked against the compute on every build; it cannot drift from its own code.
Only 100 of 250 sold shares are matched by replacement shares; the disallowed loss is the matched shares' loss.
“If the amount of stock or securities acquired (or covered by the contract or option to acquire) is less than the amount of stock or securities sold or otherwise disposed of, then the particular shares of stock or securities the loss from the sale or other disposition of which is not deductible shall be determined under regulations prescribed by the Secretary”
“The stock or securities acquired will be matched in accordance with the order of their acquisition (beginning with the earliest acquisition) with an equal number of the shares of stock or securities sold or otherwise disposed of”
Each quoted passage is exact-matched, after typographic normalization, against the corpus text fetched from the issuing authority (hashes in the corpus manifest). An item whose quote stops matching fails the build.
“The stock or securities acquired will be matched in accordance with the order of their acquisition (beginning with the earliest acquisition) with an equal number of the shares of stock or securities sold or otherwise disposed of.” — cfr-1-1091-1
675 USD is the correct disallowed loss. Initial logic and parameters are validated. The final calculation applies the $6.75 per share loss to the 100 matched shares, yielding exactly 675.
“Where the amount of stock or securities acquired within the 61-day period is less than the amount of stock or securities sold or otherwise disposed of, then the particular shares of stock or securities the loss from the sale or other disposition of which is not deductible shall be those with which the stock or securities acquired are matched in accordance with the following rule: The stock or securities acquired will be matched in accordance with the order of their acquisition (beginning with the earliest acquisition) with an equal number of the shares of stock or securities sold or otherwise disposed of.” — cfr-1-1091-1
The realized loss per share is $25.15 - $18.40 = $6.75. Since only 100 replacement shares were acquired in the 61-day window, the wash sale disallowance applies to 100 shares, so the disallowed loss is 100 * $6.75 = $675. This matches the key within tolerance.
v1; no errata. Demonstrate a key error and the correction is published here, credited — challenge policy.