My father is 83 and has spent over 50 years studying US stocks.

Here are his simple rules for beginners:
1. Price drops 5% → Hold
2. Price drops 15% → Buy 10%
3. Price drops 25% → Buy 25%
4. Price rises 5% → Hold
5. Price rises 15% → Hold
6. Price rises 25% → Sell 10%
7. Price rises 35% → Sell 20%
8. Price rises 45% → Sell 30%
9. Price rises 60% → Sell 40%
10. Price rises 100% → Exit fully
Discipline + patience = consistent long-term growth.
Save this.