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- Joined
- Jun 25, 2005
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- 10,252
Of course we track cost basis ourselves and use MS Money to do so. We don't have that many transactions, so it is really very simple. We've been doing it since the 1980s without any issues. We can also compare to what our brokers tell us for cross validation.
In order to compare the performance of our portfolio to benchmark portfolios, we also enter transactions in tax-advantaged accounts where cost-basis is not important. We do know our XIRR() between any 2 dates very easily.
And if you are gifted shares, I suppose you can enter nowadays cost basis at your broker, but otherwise they would have no way of knowing your cost basis.
In order to compare the performance of our portfolio to benchmark portfolios, we also enter transactions in tax-advantaged accounts where cost-basis is not important. We do know our XIRR() between any 2 dates very easily.
And if you are gifted shares, I suppose you can enter nowadays cost basis at your broker, but otherwise they would have no way of knowing your cost basis.