The Nikkei 225 is a price-weighted average, so a handful of high-priced chip names can move the whole index far more than their economic size suggests. This guide explains the mechanics, contrasts the Nikkei with TOPIX, walks through a real worked example, and shows how Japan’s semiconductor policy reinforces the sector’s outsized market role.
How borrowing cheap yen links US rates, USD/JPY, and the Nikkei — why a sharp yen rally forces global deleveraging, and how to monitor carry stress with public Tokyo market data.
From negative rates and yield-curve control to normalization: how BOJ meetings work, why banks rally when rates rise while exporters watch the yen, what the central bank’s legacy ETF holdings mean, and a practical checklist for reading the market reaction to policy statements.
Short sales recently averaged around 38% of all Tokyo trading value — and that is normal. A practical guide to the TSE’s daily short-selling data: the two regulatory buckets, why a high ratio is not simply bearish, and how to cross-check it against weekly investor flows.