I ran into a case in PortfolioCenter where the Cost Basis Reconciliation report showed a negative cost basis for several positions that had been sold. Now what?

Reconciliation Report showing negative cost basis for sold positions
The report looked listed 0.00 shares with a negative cost basis in PortfolioCenter (above).

Sell on day before ROP
The problem results from ROP transactions that hit the account after the mortgaged backed position had been sold.

Sell date after ROP
To solve the problem:
- Cancel the sell.
- Change the date of the Interest and ROP to the day before the sell.
- Repost the sell.