At MUFG Securities, I have purchased stocks at significantly discounted prices during pre-market trading, but have never sold any. After all, during pre-market trading, the number of participants drops sharply and market fluctuations are rough. Even if NVIDIA had fallen significantly during pre-market trading, as can be seen from its performance, it surprisingly does not drop much. This is because there are many market participants and the volatility becomes smaller. Official records only show the closing price.