How come the beta calculation on some sites are so far off??? Ex. HZO Yahoo Finance 1.4 CNBC 1.2 Reuters 2.16 Google 2.04
Most likely the differences are due to: - sample size (e.g. 3 years, 5 years, 10 years etc.) - unit of analysis (e.g. daily or monthly returns) - frequency of updating (calculated yesterday or a week ago) - and perhaps the benchmark used (e.g. S&P500, Russell 2000 etc.)