Neutral. The absence of a valid P/E ratio happens when a stock can not be valued on the basis of a negative stream of earnings.

AMZN's P/E is negative making this valuation measure meaningless.

Average. The P/CF ratio, a stock’s price divided by the company's cash flow from operations, is useful for comparing companies with different capital requirements or financing structures.

AMZN is trading at a valuation on par to its peers.

Premium. A higher price-to-projected earnings ratio than its peers can signify a more expensive stock or higher future growth expectations.

AMZN is trading at a significant premium to its peers.

Neutral. The PEG ratio is the stock’s P/E divided by the consensus estimate of long-term earnings growth. Faster growth can justify higher price multiples.

Ratio not available.

Premium. A higher price-to-book ratio makes a stock less attractive to investors seeking stocks with lower market values per dollar of equity on the balance sheet.

AMZN is trading at a significant premium to its peers.

Lower. Elevated earnings growth rates can lead to capital appreciation and justify higher price-to-earnings ratios.

However, AMZN is expected to significantly trail its peers on the basis of its earnings growth rate.

Discount. In the absence of P/E and P/B multiples, the price-to-sales ratio can display the value investors are placing on each dollar of sales.

AMZN is trading at a significant discount to its industry on this measurement.

Average. Comparing a company's sales growth to its industry helps to determine if the company is adding or losing market share.

AMZN is keeping pace with its peers on the basis of sales growth.