The 30 companies that comprise the Dow Jones Industrials collectively failed to increase sales in 2013. Yet the price of the Dow surged more than 25%. And while that price appreciation for the big-time benchmark may be slowing, the Dow still managed to eclipse 17,000 without generating much in the way of actual revenue growth.

Sales at S&P 500 corporations have also been unimpressive. According to senior index analyst at S&P Capital IQ, Howard Silverblatt, aggregate sales per share for S&P 500 constituents registered $2.49 billion in Q1 of 2014. Back near the last bear market’s inception in Q1 of 2008? $2.65 billion. If Silverblatt is correct, one method of measuring revenue strength (i.e., sales-per-share) is less vibrant today than during the beginning of the Great Recession.

Of course, analysts keep drilling home the notion that the bull market rests on the trajectory of corporate earnings. The problem with relying on the profitability data alone is that the data is being manipulated. Record low interest rates since the end of 2008 have fostered binge borrowing by corporations and the subsequent financing of nearly $2 trillion in stock buybacks (Q1 2009 – Q1 2014). The effect? A misguided perception that earnings are barreling forward. In truth, earnings-per-share appear strong because buybacks reduce the number of shares in existence, artificially reducing the trumpeted price-to-earnings (P/E) ratio.

It is also worth noting that the current price-to-sales (P/S) ratio for the S&P 500 (1.77) is roughly 25% higher than the median P/S in the 21st century (1.42). The historical mean since the market benchmark began? Around 0.9. It follows that most folks can reasonably assume that U.S. stocks are quite expensive in the context of the revenue that corporations have been generating.

The concern led me to identify a handful of broader-based U.S. ETFs with substantially lower price-to-sales numbers than the S&P 500. The ratios in the table below come from the most recent Morningstar data feed and/or a provider’s web site:

Bargain ETFs? These Funds Have Low P/S Ratios
Current P/S
RevenueShares Large Cap Fund (RWL)0.68
First Trust Mid Cap Value AlphaDex (FNK)0.70
WisdomTree Small Cap Earnings (EES)0.82
First Trust Consumer Staples AlphaDex (FXG)0.83
WisdomTree Large Cap Value (EZY)0.86
S&P 5001.77

Let’s consider WisdomTree Small Cap Earnings (EES). Not only is its price-to-sales a better “deal” than the S&P 500, but EES boasts a trailing 12-month P/E that is 12.3% lower than that of the S&P 500 and 24.7% lower than iShares Russell 2000 Small Cap (IWM). Sales-per-share might not be the only metric, but perhaps we should not ignore it either.

Some might wonder whether there is any evidence to support whether the sales data even matters. This may be difficult to quantify. However, over the last three years, EES has produced 10 percentage points more than its benchmark competitor.  Perhaps 1000 basis points is worthy of additional investigation.