Nikkei 225 daily returns heatmap

This article concerns the daily returns for the Nikkei 225 from 1984.

Average daily returns

The following table shows the average return since 1984 of the Nikkei 225 Index for each day of the year. For example, over the last 30 years the average daily return for the Nikkei 225 on 4 January has been 0.38%.

In the table, positive average daily returns are coloured green, while negative average returns are coloured red. Daily returns are highlighted dark green (red) for large positive (negative) returns. (See below for the definition of large.)

Average daily returns heatmap - Nikkei 225

OBSERVATIONS:

  • The day with the greatest number of large positive average returns is the 25th of the month.
  • Five days of the month have no large positive average returns: 11th, 16th, 18th, 22nd, 24th
  • The month with the greatest number of large positive average daily returns is March.
  • The month with the greatest number of large negative average daily returns is September; while December is the only month with no large negative average daily returns.
  • The longest period of the year with no large negative average daily returns is 20 November to 7 Jan.

Positive daily returns

The following chart is similar to the above, except this shows the proportion of positive returns for each day of the year. For example, since 1984 67% of the Nikkei 225 Index returns on 4 January have been positive.

Positive daily returns heatmap - Nikkei 225

Definition of large

Values are highlighted as large if they are more than 1 standard deviation from the average. For example, for the daily returns in the first chart the average daily return (for all days) is 0.02% and the standard deviation 0.33, so values are highlighted if they are above 0.35% (0.02 + 0.33) or below -0.31% (0.02 – 0.33).


Other daily return heatmaps.

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