Nang challenges the conventional stop-loss mindset, arguing that if fundamentals haven't changed, adding to a losing position can be optimal. He also explains why many quant firms avoid hard stops altogether.
Hiren uses a fixed‑fraction risk model (1 % of account per trade) and places stop‑losses at the previous day low, which historically is rarely breached by winners. He adjusts position size based on stop‑loss width, keeping risk constant while varying exposure.