Investors are interested in the volatility of a stock for various reasons. One investor may desire to purchase a low volatility stock for peace of mind. Another may be interested in a high volatility stock in order to have the opportunity to buy low and sell high as the price of the stock oscillates. This author had the fortunate timing of reading S. Maure's "Hat Derivatives" while reviewing K. Riley's "Using Spreadsheets to Estimate the Volatility of Stock Prices" and thus was able to see a connection between the two articles. The first article discusses the hat derivative, which is essentially a relative derivative. The second article estimates the volatility of a stock price using a parameter related to the hat derivative. The purpose of this paper is to show the relationship between the two articles and to investigate the volatility of two stocks. (Contains 3 figures.)