The ups and downs of any investment are referred to as Volatility.
If stock ABC fluctuates a lot (in terms of quantity and/or number of times) over a short period of time, but XYZ fluctuates much less, ABC is said to be more volatile than XYZ.
The volatility of FD returns is much lower than that of stock returns.
The volatility of large-cap stocks is normally lower than that of small-cap stocks.
