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Volatility is defined as the price range for a period, divided by the average price for the period: For instance, on 1/2/2009 the average price was 4.54 with a range of 0.38, indicating a Daily Volatility of 8.3%. The Daily Volatility is obtained by dividing the daily range by the daily average. A longer Volatility period such as Weekly Volatility is obtained by dividing the weekly price range by the weekly mean price. This is a different concept from the weekly average of daily volatility. For reference, the price is plotted in red. 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 29 years, the Average Quarterly Volatility of MOT stock price has been 30% while the Average Daily Volatility has been 3%. |
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You may be familiar with the "yield curve" which shows how interest bearing yields vary according to term. Each Volatility Curve is a snapshot in time. As the timespan across which Volatility is measured increases, the Volatility is expected to increase. The relationship between the length of time, and the expected change in price, is not linear, as is demonstrated by this chart. |
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This histogram is a frequency distribution of Daily Volatility, corresponding to the green points on the first chart on this page. |
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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 MOT : |
| Friday, January 02, 2009: We have news on Verizon, ticker symbol VZ. A significant moving average event has happened. Also, there are breaking events concerning C.R. Bard, Inc. and Raytheon Company. From the News Archive: (1/2/2009 ) Bad news came from Wisconsin Energy Corporation, Intel, AT and T, and Williams Companies, Inc.. |