ARTICLE SYNOPSIS...Log Spirals In The Stock Market by William T. Erman The basic mathematical characteristic of the log spiral is that even while increasing or decreasing in size, the log spiral remains constant. This is also true for rectangular spirals, the parameters
ARTICLE SYNOPSIS...CONVERTING ABSOLUTE DATA TO CHANGE IN LOG OF PRICE Sidebar Figure 1 is a sample of weekly interest rate and S&P 500 index data and the formula used to convert absolute interest rate data to changes in logs. Formulas first calculate the log of price and