investment loss
A financial term referring to a loss incurred from an investment.
The investment loss was larger than expected.
He reported the investment loss on his tax return.
投資 means 'investment' in general, while 投資損失 specifically refers to the loss resulting from an investment.
損失 is a broader term for 'loss', not limited to investments.
Compound of 投資 (investment) and 損失 (loss).