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The Short Ratio

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This week's Screen looks at a market sentiment indicator called the 'short ratio' to find new stock picks.

The short ratio is the number of shares sold short (short interest or bets that the stock will go lower in price) divided by the average daily volume. This is also sometimes referred to as the "days to cover" ratio because it tells approximately how many days it will take short-sellers to cover their positions if good news sends the price higher.

The higher the ratio, the longer it would take to buy back the 'sold' (borrowed) shares. And in theory, the more short positions there are to cover, the stronger the short covering rally would be.

Many people who use this indicator like for the number of "days to cover" to be higher than 8-10 days. It's generally believed that a short ratio of that size could prove difficult to cover and therefore trigger a strong rally on any hint of an upswing. (My personal preference is to take that into consideration, but also compare it to the industry's average ratio and the stock's own historical ratio.)

And while I wouldn't recommend using just the short ratio as the 'be all and end all' of screening items, I do think it can be a great tool for helping define great opportunities.

For example: sometimes when I'm looking for stocks that have been in a lengthy consolidation, I'll look for those stocks with high short ratios.


Because consolidation ranges are basically areas of market indecision. Bets are being made by both bullish and bearish investors. So finding stocks that are going back and forth near their price highs with a growing short ratio shows that ever-increasing bets are being made on prices going lower.

However, if the stock breaks out to the upside, properly positioned bulls will more than likely add to their winnings ... undecided traders will now be convinced to get long ... and shorts will have to scramble to cover their bearish bets. This can be an explosive situation.

This can be used quite effectively for bottom fishing too.

When a stock is getting battered and pundits are wrangling over whether it's the bottom or not, you should pay close attention to the short ratio.

Of course, there has to be a reason for a stock to move higher. So seeing an improving fundamental outlook is important.

But when lopsided market sentiment seems to be at its worst (reflected in investors' buying and selling) the short ratio can be just the thing to uncover extremes.

For example: for beaten down stocks you can search for companies near their 52 week lows with increasing short ratios. Or better yet, look for short ratios above their average values or even ones that are at (or near) their historical highs.

For stocks moving higher, try looking for historically high short ratios for stocks up 20% or more (new uptrend) or that have just rallied past an important moving average like the 50 or 200-day average. (Funds will often pile in at those points. So a large short ratio could propel the market significantly higher as huge buyers bid the market up while panicky shorts chase it even higher just to get out.)

The screen I'm currently running, however, is not a bottom picking screen. In fact, it's looking for stocks in solid uptrends. The parameters to this week's screen are:

  • % Price Change – Last 12 Weeks >= 20%

  • Current Price / 52-week high >= .80
    (Stocks trading within 20% of their 52-week high.)

  • Projected One Year Growth Rate > Industry Median

  • Short Ratio > 10
    (Greater than 10 days to cover.)

  • Current Short Ratio > Short Ratio 1 Month Ago
    (In other words, the short ratio has increased.)

  • Current Price >= $5

  • Avg. Daily Volume >= 100,000

Here are 5 of the companies that made the list this week (12/13/10):

(CATY - Free Report) Cathay General Bancorp
(CRR - Free Report) Carbo Ceramics Inc.
Fred's, Inc.
(SPTN - Free Report) Spartan Stores, Inc.
TXI Texas Industries, Inc.

Try using the short ratio in some of your current screens and see if it doesn't give you a greater edge and keener insight into what's really happening in your stocks.

This item isn't available in all screeners (especially the historical values and industry values), but it is available in the Research Wizard.

And remember the key to successful screening is in discovering those screens that have produced profitable results in the past. And that's exactly what you get with the powerful Screening and Backtesting ability of Research Wizard.

Sign up for a free trial to the Research Wizard today.

Disclosure: Officers, directors and/or employees of Zacks Investment Research may own or have sold short securities and/or hold long and/or short positions in options that are mentioned in this material. An affiliated investment advisory firm may own or have sold short securities and/or hold long and/or short positions in options that are mentioned in this material.

Disclosure: Performance information for Zacks’ portfolios and strategies are available at:

In-Depth Zacks Research for the Tickers Above

Normally $25 each - click below to receive one report FREE:

SpartanNash Company (SPTN) - free report >>

Carbo Ceramics, Inc. (CRR) - free report >>

Cathay General Bancorp (CATY) - free report >>

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