NEW YORK (ETF Expert) -- It may be too early to declare that the “do whatever it takes” rally is dead in the Mediterranean Sea. After all, there is still a fair amount of interest in buying broad market stock ETFs on weakness.

For example, on Wednesday, block trading institutional investors snatched up shares of the

iShares S&P 100

(OEF) - Get Report

on 12 times the normal trading volume. The activity increased OEF’s net assets under management by an attention-grabbing 3%.

By the same token, there are equally intriguing contradictions. For instance, since Mario Draghi’s July 26th pledge to do anything and everything to get the eurozone through its debt crisis, the percentage of S&P 100 stocks above a long-term moving average had collectively remained above a 200-day trendline; that is, they were able to hang in there until Tuesday. In fact, with more selling taking place on Wednesday, one can expect the slide to be even more pronounced.

OEXA200 Dips Below 200-Day

It is difficult to visualize an October surprise where buyers completely throw in the towel on


(AAPL) - Get Report

or the broader U.S. market. The large-scale block purchases of OEF demonstrate that selloffs on global growth concerns are not new; they also demonstrate the strength of the world’s central banks to act as a backstop.

On the other foot, forward-looking earnings estimates in a stagnant economy are likely to decline and disappoint. It follows that plenty of money managers are going to look for a margin of safety. They’ll focus on corporations with increasing revenue prospects (a la price-to-sales), rather than hitch a ride on an earnings express (a la price-to-earnings).

What might this mean for ETF enthusiasts? It may mean that you can find lower volatility and greater price stability in a revenue-weighted vehicle. The one that comes to mind is the

RevenueShares Large Cap Fund

(RWL) - Get Report


Due to the fact that RWL is ranked by revenue, not by market cap size, the top holdings represent some of the most predictable revenue stream winners around. For example, RWL’s top holding is


(WMT) - Get Report

, which reported a 4.5% revenue increase last quarter.

Over the last month and the last three months, this exchange-traded tracker has outperformed all but one of the nine S&P Style indices (

Large Cap Value

). Presently, it is above a 50-day as well as its 200-day.


Unfortunately, RWL typically serves up 30,000 shares in daily trading volume ($800,000 in dollar volume). This is not as attractive for institutional investors who purchase tens of thousands of ETF shares in bulk and who trade with some degree of frequency. Yet an individual investor who believes that revenues are much more difficult to manipulate than profits, or who believes that lower P/S (price-to-sales) ratios reflect greater bargains, may want to lean toward this revenue-weighted index fund.

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This article is commentary by an independent contributor, separate from TheStreet's regular news coverage.

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