The Shutdown Decision:

If TR-VC < 0, then set Q = 0. In other words,

First rule of holes: when you're in one, stop digging. (Anon.)

Be sure to leave explicit instructions to your agent for this contingency.

Thanks to Adrian E. Tschoegl for the suggestion. He uses the quote here (pdf). Here's a paragraph that ought to tempt you to give it a read:

I will summarize three major debacles: the cases of Barings Brothers (loss: US$1.4bn, resulting in bankruptcy), Daiwa Bank (loss: US$1.1bn), and Sumitomo Corporation (loss: US$2.6bn). The total direct losses to the parent firms in these three cases amounted to US$5.1bn. Losses due to legal consequences probably increased the total by another 25%. However, losses in the form of funds embezzled by the acters probably amount to less than 0.2%. These debacles were not the result of individuals attempting to rob their employers.