Where can I find a definition of psychological barriers with respect to marketable securities?
GuruFocus has an excellent summary of psychological barriers in the markets:  http://www.gurufocus.com/news.php?id=88451
Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
Where can I find a definition of psychological barriers with respect to marketable securities?

### Response:
GuruFocus has an excellent summary of psychological barriers in the markets:  http://www.gurufocus.com/news.php?id=88451