![]() ![]() The data is a time series, so there could also be autocorrelation.There are only 20 observations, which may not be enough to make a good inference.Visa is a component of the S&P 500, so there could be a co-correlation between the variables here.With only one variable in the model, it is unclear whether V affects the S&P 500 prices, if the S&P 500 affects V prices, or if some unobserved third variable affects both prices.However, an analyst at this point may heed a bit of caution for the following reasons: ![]()
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