Rather, risk is a perception in each investor's mind that results from analysis of the probability and amount of potential loss from an investment. If an exploratory oil well proves to be a dry hole, it is called risky. If a bond defaults or a stock plunges in price, they are called risky. But if the well is a gusher, the bond matures on schedule, and the stock rallies strongly, can we say they weren't risky when the investment after it is concluded than was known when it was made.

Value investing is the discipline of buying shares at a significant discount from their current underlying values and holding them until more of their value is realised. The element of a bargain is the key to the process.

Investors frequently benefit from making decisions with less than perfect knowledge and are well rewarded for bearing the risk of uncertainty. The time other investors spend delving into the last unanswered detail may cost them the chance to buy into situations at prices so low they offer a margin of safety despite the incomplete information

Investors need to pick their poison: Either make more money when times are good and have a really ugly year every so often, or protect on the downside and don't be at the party so long when things are good.

Pressure to produce over the short term - a gun to the head of everyone - encourages excessive risk taking which manifests itself in several ways - fully invested posture at all times, the use of leverage, and a market centric orientation that makes it difficult to stand apart from the crowd and take a long term perspective.

Value investors have to be patient and disciplined, but what I really think is you need not to be greedy. If you're greedy and you leverage, you blow up. Almost every financial blow up is because of leverage.

When managers are afraid of redemptions, they get liquid. We all saw how many managers went from leveraged long in 2007 to huge net cash in 2008, when the right thing to do in terms of value would have been to do the opposite.