The various interpretations for the P/E value

There are various interpretations for the P/E value and this is just one of them:

*N/A: A company with no earnings has an undefined P/E ratio. Companies with losses or negative earnings also fall under this category.
*0-10: This means that the company's earnings are declining. It could also mean an overlooked stock.
*10-17: This is the average healthy value
*17-25: This means that the stock is either overvalued or its earnings are increasing.
*25+: Such companies are expected to have high future growth in earnings.

It is important that investors note avoid basing a decision on this measure alone. The ratio is dependent on share price which can fluctuate according to changes in the market.

http://myinvestingnotes.blogspot.ca/2009/11/what-does-pe-ratio-tell-you.html