Markets change
Companies get disrupted. Regulations shift. Interest rates move. A sector that dominated the last decade may not lead the next.
A calculator replays recorded prices. It cannot know tomorrow's earnings surprises, geopolitical shocks, or product failures.
Survivorship and selection bias
It is easy to search for the ticker that "would have made millions". That is selection bias: you see the winners because you picked them after the fact.
Indices and diversified funds include losers that delisted or lagged. Single-stock stories are vivid but risky as planning assumptions.
What past data is still good for
Historical data is not a crystal ball, but it is still useful for:
- Feeling the size of normal pullbacks so panic is less surprising.
- Comparing holding periods - five years vs twenty years.
- Seeing how inflation erodes cash over time.
- Teaching compound growth with concrete numbers.
Our role
AltPath is education and exploration. We are not a broker, adviser, or prediction engine. Read our disclaimer, and talk to a qualified professional before acting on personal finances.
