Sector Pulse Blog
What TOPIX-17 Actually Is: Japan's 17 Sectors Explained for Foreign Investors
The US has 11 GICS sectors. Japan's TOPIX-17 has seventeen, and they are not a translation of the US set. Here is what each one contains, which are large enough to move the index, and where the mapping to US sectors breaks.
Why AI Sector Picks Beat Random Chance: A 12-Week Backtest Approach
How to actually verify an AI-based sector pick before trusting it. A honest look at what "AI stock picking" claims mean and the minimum data required to trust one.
Weekly Sector Newsletter Fatigue: How to Extract the 3 Signals That Matter
Most sector newsletters bury 3 useful signals in 40 paragraphs of narrative. Here is how to skim any of them in 5 minutes and get the trade-relevant data.
US vs JP Sector Divergence: Why the Same Theme Prices Differently (2026)
US and JP sectors reflect the same global theme (AI, energy, rates) but often diverge in timing and magnitude. Here is how to read the gap and where it becomes an opportunity.
Sector Rotation for Busy Investors: A 15-Minute Weekly Routine (2026)
A no-nonsense weekly checklist for tracking US and JP sector performance in under 15 minutes. What to look at, what to ignore, and when to actually rebalance.
US and Japan sector performance: week of 2026-09-04
Weekly sector returns for all 11 US SPDR sectors and all 17 TOPIX-17 sectors, side by side. Energy led the US at +2.20%; Electric Power & Gas led Japan at +5.40%.
Reading Japanese and US Market Sectors Side by Side: A Beginner's Guide
Japan and US markets often move together — until they don't. This beginner's guide explains how to read sector performance in both markets side by side, what the divergences tell you, and how to track it. Not investment advice.