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.

A tipping point is invisible, as we just saw in Greece. In most situations, everything appears fine until it's not fine, until, for example, no one shows up at a Treasury auction.

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.

We are not so brazen as to believe that we can perfectly calibrate valuation; determining risk and return for any investment remains an art not an exact science

At Baupost, we constantly ask: 'What should we work on today?' We keep calling and talking. We keep gathering information. You never have perfect information. So you work, work and work. Sometimes we thumb through ValuLine. How you fill your inbox is very important.

Don't short many stocks. Instead they hedge for tail risk with CDS and options. They are happy to incur illiquidity