Decode Lab
An archive for explorers, chronicling the discoveries and insights from our ongoing journey.
September 9, 2026
Stronger Yen = Weaker Stocks, Weaker Yen = Stronger Stocks? Testing USD/JPY and the Nikkei 225
A stronger yen is often seen as a headwind for Japanese stocks, while a weaker yen is viewed as supportive. But what does the data show? We test the relationship between USD/JPY’s 1-day change and th…
August 17, 2026
How Do Rising Japanese Interest Rates Affect Stocks? — Testing EWJ with Data
Rising rates are often seen as a headwind for stocks. Our EWJ factor analysis suggests a more complicated relationship.
