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I think it reveals the underlying issue between using more granular (high-frequency) data. It generalizes the difference between having a large data sample compared to a small one. Over a longer period of time, that close figure wouldn't really impact the rest of the time series as it's only 1 data point out of many, but if you have a small sample of data points, that 1 close figure can impact the data more severely.
Generally, high-frequency data is harder to obtain, so you have a smaller sample. That's how I think about it at least. |
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