I'm sure this has been discussed elsewhere. Quicken has an annoying quirk in assigning a cost of $1 per share for cash and money market accounts. On the surface, this makes sense as these are liquid assets and their NAVs are in fact $1. The issue is brokerages assign a cost basis of $0 for these accounts. This is standard accounting and is consistent across all brokerages I do business with. Straight up cash balances can't have their cost basis changed in Quicken, but money market accounts like MSUXX or high yield savings accounts through brokerages like MSPBNA can. When you force their cost basis to $0, that money has to go somewhere, e.g., XOut. This action contaminates the IRR and pushes it artificially high. I'm pretty much resigned to the fact that in Quicken you can have accurate IRR or cost basis for cash/money market accounts, but not both. If anybody has any words of wisdom, it would be appreciated.