If you look at your 1099-B, check for numbers in box 1f and 1g. If you don't have any numbers in those boxes, you shouldn't have adjustment codes either.
Code D indicates that you need to adjust the sale of your bond by the amount of accrued market discount. If there is no number in box 1f, there shouldn't be a code D either.
Code M means the dealer has combined more than one transaction together, which requires an adjustment, so that does seem like something you may have.
If you have a number in box 1g, that is a wash sale adjustment, which is code W.
If this still doesn't make sense based on your 1099-B, you should contact your broker for more information about what they are reporting.
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"
