The US shopping season begins in earnest with "Black Friday." Holiday sales ads have increasingly targeted electronics. Shopping patterns have grown into a measurable impact on the Japanese yen, lasting from approximately Black Friday through Christmas.
The Japanese yen displays seasonal weakness between Black Friday and Christmas. I measure seasonality in many ways. Taking an average of the closing prices from the beginning and end of the period in question is one way to measure seasonality. Based on these averages, the yen has fallen between Black Friday and Christmas in 10 of the last 15