Wrong A drop in share price does impact the Z-score, as I explained to you yesterday: http://investorshub.advfn.com/boards/read_msg.aspx?message_id=54903786 And the Z-score doesn't predict day-to-day stock gyrations any more than it predicts malicious message board comments about a stock. It predicts whether or not a company is likely to go bankrupt within the next two years.