Have you looked at the reports to see if they help identify the problem?

Try the "Performance by investment account" and customize it to "show
calculation details"

If it is showing the same "cost basis", the other columns might be able to
help you identify the difference. You can also click on the investment line
to see all of the transactions associated to that investment. The cost basis
is calculated from the cost of any buys, Add Shares, or 'reinvest.."
transaction. If you have Sells or Remove Shares, then that will affect the
results as well, since it should only show the "cost basis" for your
remaining shares. You can get a definition of the columns by mousing over
them or by going into the Customization of your View in the Portfolio and
selecting the column name.

If it is only that one investment and there are no other transactions (i.e.
only the initial "buy"), then it might be corrupted (or inadvertently
created as a different 'type').
So, you could first simply try editing the Buy: change the quantity and/or
price and see if that causes the cost basis to correct)
Otherwise, I'd suggested deleting it and try re-entering it.
If deleting the Buy transaction and re-entering it doesn't resolve it, then
try deleting the investment and recreate it:
- first in the Portfolio Manager, right mouse click the investment and go to
Investment Details and remove any symbol
- then go back to the Portfolio and under Common Tasks, click Work with
Investments and choose to Delete and investment from all accounts
- after that is done, try recreating it.

-Mark


"Alan Blandford" <AlanBlandford[at]discussions.microsoft.com> wrote in message
news:B75D5CD8-1AA8-445E-BFB8-5FC57803F9E1[at]microsoft.com...
- quote -

If you enter Buy for a "different" British investment is it also off?
If so, then that may mean that the account where you are entering these
purchase is configured for a different currency than pounds.

Also go ahead and check the file currency settings to see if the default
currency for the file is not pounds.

If entering a different purchase for a different investment gives the
correct results, and there are no other transactions for the original
investment (as Cal asked), then it may be that this investment was entered
as the wrong type (for example as a bond, since a bond's price is actually a
"percent of par value" and not an actual price).

-Mark

"Alan Blandford" <AlanBlandford[at]discussions.microsoft.com> wrote in message
news:2C688F43-43AC-4DE2-9DDF-F80954BF6EFC[at]microsoft.com...
- quote -

In microsoft.public.money, Alan Blandford wrote:

- quote -

Right-click that transaction, and go to that investment's Investment
Activities. See if there are other transactions there, such as a
return of capital transaction.

In microsoft.public.money, Alan Blandford wrote:

- quote -

Examine the transactions for that investment. Make sure the
transactions are correct.