Excess capacity in people, machines, or property will be quickly absorbed.

Value investing requires a great deal of hard work, unusually strict discipline, and a long-term investment horizon. Few are willing and able to devote sufficient time and effort to become value investors, and only a fraction of those have the proper mind-set to succeed.

When you buy bargains and they become better bargains, it is easy to start to question yourself, which can impair your judgement. Real or imagined concerns about client redemptions, employee defections can greatly influence behavior away from rational.

There are only a few things investors can do to counteract risk: diversify adequately, hedge when appropriate, and invest with a margin of safety. It is a precisely because we do not and cannot know all the risks of an investment that we strive to invest at a discount. The bargain element helps to provide a cushion for when things go wrong.

Warren Buffett likes to say that the first rule of investing is "Don't lose money," and the second rule is, "Never forget the first rule." I too believe that avoiding loss should be the primary goal of every investor. This does not mean that investors should never incur the risk of any loss at all. Rather "don't lose money" means that over several years an investment portfolio should not be exposed to appreciable loss of principal.

When excesses such as lax lending standards become widespread and persist for some time, people are lulled into a false sense of security, creating an even more dangerous situation. In some cases, excesses migrate beyond regional or national borders, raising the ante for investors and governments. These excesses will eventually end, triggering a crisis at least in proportion to the degree of the excesses. Correlations between asset classes may be surprisingly high when leverage rapidly unwinds.

Short-term performance envy causes many of the shortcomings that lock most investors into a perpetual cycle of underachievement. Watch your competitors not out of jealousy but out of respect and focus your efforts not on replicating others' portfolios but on looking for opportunities where they are not. The only way for investors to significantly outperform is to periodically stand far apart from the crowd, something few are willing, or able, to do.