Financial innovation can be highly dangerous, though almost no one will tell you this. New financial products are typically created for sunny days and are almost never stress-tested for stormy weather. Securitization is an area that almost perfectly fits this description; markets for securitized assets such as subprime mortgages completely collapsed in 2008 and have not fully recovered. Ironically, the government is eager to restore the securitization markets back to their pre-collapse stature.

Analysts recommendations may not produce good results. In part this is due to the pressure placed on these analysts to recommend frequently rather than wisely.

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.

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.

A margin of safety is achieved when securities are purchased at prices sufficiently below underlying value to allow for human error, bad luck, or extreme volatility in a complex, unpredictable and rapidly changing world.

Selling, in particular, can be a challenge; many investors are tempted to become more optimistic when a security is performing well. This temptation must be resisted; tax considerations aside, when a security reaches full valuation, there is no longer a reason to own it.

Warren Buffett is right when he says you should invest as if the market is going to be closed for the next five years. The fundamental principles of value investing, if they make sense to you, can allow you to survive and prosper when everyone else is rudderless. We have a proven map with which to navigate. It sounds kind of crazy, but in times of turmoil in the market. I’ve felt a sort of serenity in knowing that if I’ve checked and rechecked my work, one plus one still equals two regardless of where a stock trades right after I buy it.