The 2D:4D ratio refers to the length of your second digit (index finger) divided by the fourth digit (ring finger) .
Here’s how it works:
- If your ring finger is longer than your index finger , your ratio is low — linked to higher prenatal testosterone exposure.
- If your index finger is closer in length to your ring finger , your ratio is high — associated with higher estrogen exposure in the womb.
This subtle difference has been studied extensively across psychology, economics, and biology — and the results are fascinating.
📊 What Your Fingers Might Be Saying About You
1. 🧾 Higher Ring Finger = More Financial Risk-Taking
Studies show traders and financial professionals with lower 2D:4D ratios (longer ring fingers) tend to take more risks — and earn more as a result.
One study found that London City traders with lower ratios earned up to £50,000 more per year than those with higher ratios.
💡 Why? Prenatal testosterone exposure affects brain development, aggression, and competitiveness — all useful in fast-paced, high-stakes environments.
