def cumulative_loss_on_repeated_dips(initial_price=100, drop_percent=1.5, num_drops=20):
    price = initial_price
    total_invested = 0
    total_value = 0

    print(f"{'Step':>4} | {'Price':>8} | {'Invested':>10} | {'Total Value':>12} | {'Loss %':>8}")
    print("-" * 52)

    for i in range(1, num_drops + 1):
        price *= (1 - drop_percent / 100)
        total_invested += initial_price
        total_value += price
        loss_pct = (1 - total_value / total_invested) * 100
        print(f"{i:>4} | {price:>8.2f} | {total_invested:>10.2f} | {total_value:>12.2f} | {loss_pct:>8.2f}")

    final_loss_pct = (1 - total_value / total_invested) * 100
    print("\n📉 Perte finale cumulée :", round(final_loss_pct, 2), "%")

# Exemple :
cumulative_loss_on_repeated_dips(drop_percent=1.5, num_drops=20)