While analysts have proven over and over again that they are human (can't be more polite than that) the impact that they have on short-term stock values is clear. Intuitive Surgical Inc. (NASDAQ: ISRG), which closed yesterday at $348.50, dropped to $310.54 at the opening bell and is now trading at $292.00 as I type away. I will report the closing price in an update, but for now the stock has been hit hard -- down over 16%.

ISRG the maker of the da Vinci system, which uses robotic equipment and computers to do minimally invasive surgical procedures disappointed analysts and the stock was punished. Interestingly ISRG reported strong growth and even a positive outlook, however, that outlook was not as glowing as analysts expected and the result is not pretty. Does this mean that the company is not doing very well -- no. Does this mean that the stock price will not be higher next year than it is today -- the answer is no again.

What it does mean is that like other stocks with nosebleed valuations, such as Intuitive's with a trailing P/E of 80, they remain hypersensitive to the slightest deviation from expectations, reasonable or not. This happens even when Intuitive Surgical Q1 profit almost doubled.