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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 7/1/2009 of 4.3%, the price range for the day (1.20) was divided by the average price (27.33). 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. Volatility, as measured through various intervals, ( Daily, Weekly, Monthly and Quarterly) is plotted according to color. Investors often make a distinction between the concept of Volatility, and the concept of Risk. Academics define them to be exactly equivalent, but as can be seen here, there is good reason to distinguish between the levels of volatility or risk experienced across different time frames. During 26 years, the Average Quarterly Volatility of ADM stock price has been 22% while the Average Daily Volatility has been 3%. |
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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 ADM 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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Similarly, the purple points on the top chart, the Quarterly Volatility Values, are subjected to frequency distribution here. |
Refined Volatility Risk Analysis for ADM : |
| Wednesday, July 01, 2009: We have news on Pitney Bowes Inc., ticker symbol PBI. A significant moving average event has happened. Also, there are breaking events concerning Public Service Enterprise Group Inc. and Pinnacle West Capital Corporation. From the News Archive: (7/1/2009 ) A favorable event happened at The Travelers Companies, Inc.. Meanwhile, bad news came from Fiserv, Inc., MeadWestvaco Corp., and Nicor Inc.. |