Beta Calculation

Reports beta over eight lookback windows at once, from seven days out to two years, using a separate custom beta formula for each period. Seeing them side by side is the point: a stock whose short window beta has climbed well above its two year figure is behaving differently now than its long run reputation suggests, and one number cannot show that. Paste a list of symbols down the first column and every window fills across. Values refresh from MarketXLS with the add-in installed, so the table can be re-run as conditions change.