The 30-day rule is designed to prevent investors from using capital losses to manipulate their tax liabilities through a technique called tax-loss harvesting. Here's why you can't sell a stock within 30 days after purchase if you don't invest back into it:
- Prevent Artificial Losses: The IRS prohibits the wash sale rule to prevent investors from creating artificial losses by selling securities at a loss and then buying them back or substituting a similar security within a short period. This strategy allows investors to claim the loss on their tax return, reducing their taxable income.
- Maintain Economic Reality: The rule ensures that investors are not economically out of a position for a sufficient period to qualify for the loss deduction. By requiring a 30-day wait period, the IRS ensures that the loss is real and not manufactured for tax purposes.
- Avoid Double Counting: If you sell a security at a loss and then buy it back within 30 days, the loss is added to the cost basis of the replacement security. If you sell the stock within 30 days, the loss cannot be claimed, and the cost basis remains unchanged. This prevents double counting of losses and maintains the integrity of the tax system.
In summary, the 30-day rule is in place to prevent investors from using tax-loss harvesting to manipulate their tax liabilities and to ensure that losses are real and not artificially created.