This document provides an introduction to investing and discusses several key concepts:
1) It is impossible to consistently predict when markets will rise and fall, so the best strategy is to invest regularly over time through ups and downs to benefit from pound cost averaging.
2) While it is difficult to determine if markets are cheap or expensive, standard valuation metrics like the price-to-earnings ratio can provide some guidance.
3) All investments carry risk, and higher potential returns generally require taking on more risk. It is important to understand the risks and reduce risk exposure when markets are highly valued.