In a mature stock market of foreign countries, the price-earnings ratio approach and price-sales ratio approach are used to assess the value of stocks in common.

市盈率估值法和市销率估值法是国外成熟的证券市场上常用的股票投资价值的评估方法，但他们作为单一指标具有一定的局限性。

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Similarly, with a price-to-sales ratio of 2.61x, the stock looks rather undervalued compared to the historically normal range of 3.43x to 10.44x.

FORBES: Look At The Numbers: RIMM Should Be $86

The price-to-sales ratio remains a useful tool in sizing up a stock.

FORBES: Magazine Article