Volatility is the measurement of risk used most often in the investment industry. Put simply, it measures how variable price changes are in relation to the price trend for an investment. It is important to note that volatility says nothing about the direction of the trend itself. Expressed in slightly more technical terms, volatility is a measure of how much a set of returns for an investment deviates from the price trend or mean of that investment. It is usually calculated as ´standard deviation´ and expressed as ´annualized volatility´ – the standard deviation on a yearly basis