Are the rapidly increasing returns of US stock indexes sustainable in the long term?My concern is that the returns of yen-based US stock index funds have risen extremely over the past three years.

One year since the launch of the new NISA, how long will it remain the top US stock index? – Yahoo! News

One year since the launch of the new NISA, how long will it remain the top US stock index? – Yahoo! News
Are the rapidly increasing returns of US stock indexes sustainable in the long term?My concern is that the returns of yen-based US stock index funds have risen extremely over the past three years.

https://news.yahoo.co.jp

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