Many investors realize that the stock market is a volatile place to invest their
money. The daily quarterly and annual moves can be dramatic,
but
it is this volatility that also generates the market returns
investors
experience.
Volatility
is a
measure of dispersion around the means
or average return
of
a security. One way
to measure volatility is by using the standard deviation, which
tells you how tightly the price of a stock is grouped around the means or
moving
average (MA). When the prices are tightly bunched together, the standard
deviation is small. When the price spread apart, you have a relatively large
standard deviation.