PEG全称price/earnings-to-growth，指的是市盈率相对盈利增长。

PEG指标（市盈率相对盈利增长比率）是用公司的市盈率除以公司的盈利增长速度。PEG指标（市盈率相对盈利增长比率）是Jim Slater发明的一个股票估值指标，是在PE（市盈率）估值的基础上发展起来的，它弥补了PE对企业动态成长性估计的不足。当时他在选股的时候就是选那些市盈率较低，同时它们的增长速度又是比较高的公司，这些公司有一个典型特点就是PEG会非常低。其计算公式是：PEG=PE/（企业年盈利增长率*100）

The price-to-earnings ratio (P/E) is one of the most widely used metrics for investors and analysts to determine stock valuation. In addition to showing whether a company's stock price is overvalued or undervalued, the P/E ratio can reveal how a stock's valuation compares to its industry group or a benchmark like the S&P 500 index.

PCF全称price-cashflow ratio，指的是市现率，股票价格与每股现金流量的比率。

市现率可用于评价股票的价格水平和风险水平。市现率越小，表明上市公司的每股现金增加额越多，经营压力越小。对于参与资本运作的投资机构，市现率还意味着其运作资本的增加效率。不过，在对上市公司的经营成果进行分析时，每股的经营现金流量数据更具参考价值。

The price-to-cash flow (P/CF) ratio is a multiple that compares a company's market value to its operating cash flow or its stock price per share to operating cash flow per share. The P/CF multiple works well for companies that have large non-cash expenses such as depreciation.

以下为相关双语示例，供参考：

The PEG ratio was used to justify and compare the high P/Es of the various Internet tech stocks and justify their lofty valuations.

市盈率相对盈利增长比率被用来牵强地证明互联网科技股票的虚增价值与高市盈率的合理性。

Also note that the same result would be determined if the market cap is divided by the total cash flow of the firm. PCF ratio is a simple tool for evaluating a company, but no single ratio can tell the whole story.

还要注意的一点是，如果用市值除以公司的现金流量总额，也将会得到同样的结果。市现率是用于评估公司的单一工具，但是没有哪一个单一的比率可以说明全部情况。