I think what you're asking is how to convert an existing holding into AIM or LD-AIM.
If so, 'significantly down' from what? The original cost basis? Or your cost basis which I believe is set at the time you received/inherited the position.
Whatever that # is, the value at today's price is what is accesible.
So I would use Current total Value and Current Price/Share as the starting points in my worksheet.
Enter the total current value of your position in the Total $ Available cell, the current price/share in the Initial Purchase Price/Share cell and then whatever settings you want to assign.
The LD-AIM Outputs generated would provide 'guidance' as to redeployment of the asset.
For example, if you had a holding of 6,000 shares of ZYXW at a today's price of $5.00/share... With standard AIM settings, you would keep about 2500 shares and sell off the rest. Note that 'the rest', some 3500 shares, become Virtual.
The proceeds of selling the 3500 shares would fund your cash reserve for the program and still leave ~$3500 to redeploy as part of an overall diversification effort. Of course you can run any number of scenarios given your settings options, but the key inputs are those first 2; $ Available and Price/Share.
Back in 2003 I needed to redeploy, raise some cash and reduce risk via diversification on all or most of my few Classic AIM programs.
I was in somewhat the same situation as you describe, except what I inherited and had to address were my own bad decisions during the dot-com heyday.
In effect I had to accept the fact that if I didn't change my direction I was going to end up where I was headed; and that was not looking to be a good place.
So I built the LD-AIM worksheet to assist in that effort. I sold off some entirely and some as described above. Virtually all of what I sold was at a loss but it wasn't going to get better unless I did something about it.
I've never looked back and have not second-guessed my decisions at the time.
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