=?UTF-8?Q?How_to_calculate_the_rolling_co?=
Hi All I have a table t.q)tsym minute ri rm--------------------------------IBM 09:30:00 0.10 0.05IBM 09:31:00 0.05 0.03IBM 09:32:00 0.11 0.05IBM 09:33:00 0.13 0.02IBM 09:34:00 0.11 0.04 How to calculate the rolling covariance(cov1) and mobile covaria...