Recently, an 89-year-old Japanese trader went viral. This old man made 2 billion yen (84 million yuan) trading stocks. And he generously shared his ancient, god-tier trading secrets:

1. Down 5% --> Do nothing
2. Down 15% --> Increase holdings by 10%
3. Down 25% --> Increase holdings by another 25%
4. Up 5% --> Continue holding
5. Up 15% --> Continue holding
6. Up 25% --> Sell 10%
7. Up 35% --> Sell 20%
8. Up 45% --> Sell 30%
9. Up 60% --> Sell 40%
10. Up 100% --> Sell everything