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Apple Computer Historical Volatility

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AAPL:  Daily Volatility = Price Range as a percent of the daily average price.

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 2/15/2011 of 0.6%, the price range for the day (2.42) was divided by the average price (358.76). 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. It is important to avoid confusing this with the weekly average of the daily volatility, which is a completely different concept.

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. Average Daily Volatility over the history of AAPL has been 4% in contrast to the Average Quarterly Volatility of 37%.



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AAPL:  Volatility Curve

If you have ever seen a "yield curve" you should be able to understand the concept behind this "yield curve". Each Volatility Curve is a snapshot in time. As the timespan across which Volatility is measured increases, the Volatility is expected to increase. However, as seen in this plot of the AAPL Volatility Curve, the increase is not constant.



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Daily Volatility Histogram of Apple Computer

A frequency distribution of the green points on the first chart (the daily volatility) yields this histogram.



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AAPL:  Quarterly Volatility Histogram

Similarly, the purple points on the top chart, the Quarterly Volatility Values, are subjected to frequency distribution here.

For Subscribers: Refined Analysis of Apple Computer Volatility and Risk Behavior

Refined Volatility Risk Analysis for AAPL :


Companies in the News:

In the news, Friday, February 18, 2011: An unfavorable condition has developed with Aetna Inc., ticker symbol AET. Also, there are breaking events concerning Dollar Tree, Inc. (DLTR) and First Niagara Financial Group Inc. (FNFG)

More AAPL Technical Analysis Topics

AAPL Price Predictions

Support and Resistance Levels

Politics and Prices of AAPL

Japanese Candlestick Analysis

AAPL Classical Analysis of Time Series

AAPL Historical Volume

AAPL Seasonal Trends

Market Sentiment

Back to AAPL Table of Contents


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