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by | Dec 22, 2013 | Publications. VIX is a measure of expected volatility calculated as 100 times the square root of the expected 30-day variance (var) of the S&P 500 rate of return. The variance is annualized and VIX expresses volatility in percentage points.
How BMI Is Calculated. BMI is a ratio of weight and height and is calculated using a formula. To calculate BMI, take an individual's weight in pounds and divide it by the square of her height in inches.Multiply that result by 703.So someone who weighs 140 pounds and is 5 feet 6 inches tall would have a BMI of about 22.6.MI is a ratio of weight and height and is calculated using a formula. To calculate BMI, take an individual's weight in pounds and divide it by the square of her height in inches.