I read information on the recent tax legislation putting a hold on claiming IRA losses from 2018 to 2025. But that addressed distribution of entire IRA assets, no yearly RMDs required at age 73.
No. It could formerly be claimed as an investment loss as a miscellaneous itemized deduction but because of the 2018 Tax Cuts and Job Act, that deduction is no longer available.
The deduction that has been suspended until 2026 is only for unrecoverable basis in nondeductible traditional IRA contributions. With out having distributed your entire balance in traditional IRA and having more basis in nondeductible traditional IRA contributions than the amount distributed you have no unrecoverable basis that could have been deducted even if had the deduction not been suspended.
With no unrecoverable basis, the losses in your traditional IRAs simply reduce the amount available to be taxably distributed in the future.