This document contains memos from Oaktree Capital covering various topics in investing from 1990-2009. Some key points include:
1) It's important to protect against losses while also seeking above average returns consistently over the long term.
2) The market tends to swing between extremes of euphoria and depression, and the best approach is to stay alert for extremes and adjust behavior slightly.
3) The two most important factors for investment success are investing in high quality assets and paying a good price.
4) Forecasting the future is difficult and extraordinary performance only comes from correctly forecasting non-consensus views, which are also very hard to do.