The Importance of Stock Screening

Stock screening is a very important exercise for investor to filter the market and zero in on the companies that meet their criteria. Screening tools that widely available on the net would allow you to quickly and easily search for shares showing high growth, yield or daily price movement.

Stock screening tool could be used for your technical and fundamental analysis. Personally, I prefer to use fundamental ratios before narrow down based on the technical indicators. Financial websites such as Financial Times or finviz.com provide maps or heat maps indicating the favourable and unfavourable industry of the day.  

Nonetheless, the screening tool would filter the fundamental data including:

i.   company basics information such as closing price and market capital.

ii.  share performances such as price rise or fall in a day, a week, a month or a year.

iii. growth ratios such as Earning per Share (EPS) growth and dividend growth

iv. incomes ratios such as dividend yield and dividend cover

v.  valuation ratios such as price-to-book ratio, price per earning, highest price per earning in a year

vi.  financial strength such as net gearing and net asset value per share

vii. management effectiveness such as return on assets and return on capital employed

viii.Profit & Loss account such as operating costs and revenue

ix.  balance sheet such as total current assets and net assets

x.   broker or analyst recommendations on whether sell, buy or hold

xi.  director deals

The screening tool could also be set to filter technical information such as percentage movement of price within 52 week low or high and percentage of price break above or below moving average lines.

With the comprehensive market data, the screening and analysis are more possible to be carried online. Stock exchange like NASDAQ has a comprehensive section for investors to use the stock screener.  In fact, it already has predefined stock screener that could help you to find the stocks that meet your criteria.

Financial Times also has a global equity screener that you could try out at http://markets.ft.com/screener/predefinedScreens.asp It has more than 50 customisable screening criteria. Under FT predefined screens, you could try screening criteria predefined by the world best investors including Warren Buffet and Ben Graham.

Before using the screening tool, you should have an idea on what criteria to search for. The fundamental and technical variables make the possibilities nearly endless and you might end up betting on the wrong stock. In the same time, it is crucial to ascertain that your search is using the updated databases. Otherwise, your search would be meaningless. Perhaps for a start, you could adopt some predefined stock criteria. 

The bottom line is the screening tool offer purely quantitative considerations. Some ratios are not accurately filter stock from specific industry. Technology stocks may high a slightly higher P/E because a low P/E ratio does not necessarily mean a stock is cheap. Similarly, a high P/E ratio does not mean a stock is expensive. Auto industry or retail industry for instance has a low P/E but it does not mean that those retail stocks should not been considered.