please explain? cgm v byr v nav, page-10

Following got from Wikipedia on P/E Ratio values....

P/E Ratio 0-10:
Either the stock is undervalued or the company's earnings are thought to be in decline. Alternatively, current earnings may be substantially above historic trends or the company may have profited from selling assets.

P/E Ratio 10-17:
For many companies a P/E ratio in this range may be considered fair value.

P/E Ratio 17-25:
Either the stock is overvalued or the company's earnings have increased since the last earnings figure was published. The stock may also be a growth stock with earnings expected to increase substantially in future.

P/E Ratio 25+:
A company whose shares have a very high P/E may have high expected future growth in earnings or the stock may be the subject of a speculative bubble.