Historic Vanguard 401k data lacking cost basis and any way to add it

Eric N

My data downloaded from my Vanguard 401k appears to lack cost basis information after a rebalancing last year. All the ongoing regular investments show proper cost-basis, just the "initial" balances post rebalancing all show 0 cost basis. The downloaded transactions are all shown as add/remove shares with zero cost, rather than buy/sell.

What's the best way to fix this? I thought some accounts would let you edit the cost basis on the Portfolio tab for a given date/security, but I'm not seeing that option anymore so I'm probably mis-remembering.

Jon

You'll need to add the cost basis to each individual Add Shares transaction. Double click on the transaction and you can set the original cost of the shares as well as the original purchase date. (If you click on the pencil next to Price Per Share you can enter that instead of the Total Cost.)