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Volatility is defined as the price range for a period, divided by the average price for the period: So, to derive the Daily Volatility on 3/12/2010 of 1.3%, the price range for the day (0.42) was divided by the average price (31.19). Daily Volatility (the daily range as a portion of the daily average price) is plotted in green. Blue is Weekly Volatility, which is the weekly range as a portion of the weekly average price. This is a different concept from the weekly average of daily volatility. The red plot shows the actual price. The remaining marks on the plot correspond to the Volatility measured across several time intervals. According to academic theory, Volatility is exactly equal to Risk. But investors often make a distinction between these two concepts. The different character of Volatility as seen in different time frames, lends some support to the investor's view. During 28 years, the Average Quarterly Volatility of DBD stock price has been 23% while the Average Daily Volatility has been 2%. |
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If you have ever seen a "yield curve" you should be able to understand the concept behind this "yield curve". These Volatility Curves each apply to a discrete time interval. From left to right, each position plots the Volatility associated with increasing intervals of time. However, as seen in this plot of the DBD Volatility Curve, the increase is not constant. |
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A frequency distribution of the green points on the first chart (the daily volatility) yields this histogram. |
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In a similar vein, the Frequency Distribution of the Quarterly Volatility is plotted here. This is the distribution of the values plotted in purple on the top chart from this page. |
Refined Volatility Risk Analysis for DBD : |
| Thursday, March 18, 2010: We have news on MicroSoft, ticker symbol MSFT. Signs of an over-bought condition have become noticable. Also, there are breaking events concerning Mylan Inc. and Patterson Companies, Inc.. From the News Archive: (3/17/2010 ) A favorable event happened at ACM Income Fund. Meanwhile, bad news came from Prudential Financial, Inc., Sempra Energy, and Walmart. |