Hi, Stewart.
Quicken probably thinks you still have some tiny fraction of a share because of rounding of prior transactions. It happens often.
A quick example: You buy 100 shares; it splits 4-3, so you are entitled to
133.3333333 shares. You get 33 new shares, plus cash for .333 fractional shares. You record the sale of .333 shares - and Q thinks you still have
133.00033333 shares left. Then you sell all your stock and record the sale of 133 shares. Q thinks you still have .00033333 shares, so it continues to show the security. And if the stock is worth $10 per share today, your net worth also includes $0.033333 for this phantom security.
The best way to handle this - now and in the future - is to never let Q compute the number of shares. Always enter transactions in even shares (to no more than 3 decimal places, even for mutual funds) and even pennies for total dollar amounts. It's OK to have tiny fractions in per-share prices, because they are seldom of long-term significance except as history. But always record total dollars to the nearest penny, and record stocks to the nearest whole share (or .000).
Go back and check all your transactions for this security, working chronologically. For any transaction (split, spin-off, etc.) that did not involve only whole shares, delete the transaction and enter it again, letting any rounding go to price per share, not total dollars or total shares. For any sales, be sure to use the option to "select lots" and let Q select the number of shares to zero out each lot.
Or use the feature added to Quicken's recent versions, in the Enter Transactions list, to Adjust Share Balance to zero. I've never used this, but I hear that it works well.
RC