If you're someone who buys and sells individual ETFs for a short period of time, you can understand that daily price movements make a mess. I'm also swinging myself.
But isn't it unavoidable for people who are mainly mutual funds for long-term investment purposes, such as NISA, to worry about the daily US market every day? Conversely, there is no one who isn't happy that unearned income is growing, but are you putting it up for sale right away?

If you look at the trading of large growth stocks today, there are so many stocks where the movements of super large and small caps are reversed.
Even if it is said that profits will be accumulated diligently, in the end, it will change drastically due to the moderation of institutional investors.
The fact that recent stock market movements are influenced more by other factors than financial results also seems to have given rise to speculative money games.
Honestly, unforeseen revisions to various indicators, such as employment statistics, foreshadow future recessions in the US economy. This week, both Japan and the US have announced policy interest rates, but no major changes have been felt.