
Python for Algorithmic Trading Cookbook
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Volatility plays an integral role in finance, serving as a key indicator of risk linked to a particular asset. A higher degree of volatility suggests a greater risk associated with the asset as it indicates more significant price changes and, therefore, a less predictable investment outcome.
Standard deviation is widely used as the measure of asset return volatility. It statistically quantifies the dispersion of asset returns from their mean, thus providing an effective metric for risk. When asset returns exhibit a larger standard deviation, it signifies more pronounced volatility, pointing to a higher risk level. Conversely, a lower standard deviation implies that the asset returns are more stable and less likely to deviate significantly from their average, indicating a lower risk.
The standard deviation’s value as a risk measure extends beyond its ability to quantify risk alone. It is a common component in calculating risk...