As value investors, our business is to buy bargains that financial market theory says do not exist. We've delivered great returns to our clients for a quarter century-a dollar invested at inception in our largest fund is now worth over 94 dollars, a 20% net compound return. We have achieved this not by incurring high risk as financial theory would suggest, but by deliberately avoiding or hedging the risks that we identified.

Here’s how to know if you have the makeup to be an investor. How would you handle the following situation? Let’s say you own a Procter & Gamble in your portfolio and the stock price goes down by half. Do you like it better? If it falls in half, do you reinvest dividends? Do you take cash out of savings to buy more? If you have the confidence to do that, then you’re an investor. If you don’t, you’re not an investor, you’re a speculator, and you shouldn’t be in the stock market in the first place.

Successful investors tend to be unemotional, allowing the greed and fear of others to play into their hands. By having confidence in their own analysis and judgement, they respond to market forces not with blind emotion but with calculated reason. Successful investors, for example, demonstrate caution in frothy markets and steadfast conviction in panicky ones. Indeed, the very way an investor views the market and it’s price fluctuations is a key factor in his or her ultimate investment success or failure.

It is important to remember that value investing is not a perfect science. It is an, with an ongoing need for judgment, refinement, patience, and reflection. It requires endless curiosity, the relentless pursuit of additional information, the raising of questions, and the search for answers. It necessitates dealing with imperfect information - knowing you will never know everything and that that must not prevent you from acting. It requires a precarious balance between conviction, steadfastness in the face of adversity, and doubt - keeping in mind the possibility that you could be wrong.

The trick of successful investors is to sell when they want to, not when they have to.

Value investors should completely exit a security by the time it reaches full value; owning overvalued securities is the realm of speculators.

If you can remember that stocks aren't pieces of paper that gyrate all the time --they are fractional interests in businesses -- it all makes sense.