Underwriting Discipline & Combined RatioNarrow moat

Everything in the float engine turns on a single discipline: keeping the combined ratio below 100. The combined ratio is claims plus expenses divided by premiums, and it is the truest test of whether an insurer is actually good at its core job. Below 100, PZU makes an underwriting profit and its float is free; above 100, it makes an underwriting loss and the float carries a cost. No amount of investment cleverness substitutes for getting this right, because chronic underwriting losses compound into ruin no matter how the portfolio performs.

PZU's scale and data are, at bottom, in service of this number: the biggest book and the deepest loss history should, in disciplined hands, produce better risk selection and a lower combined ratio than rivals can sustain. The company has generally underwritten at a profit across the cycle, which is what separates a good insurer from a mediocre one chasing premium at any price. The temptation, always, is to loosen standards to win share when competitors turn aggressive; the mark of a well-run insurer is the willingness to walk away from underpriced business and let the combined ratio, not the market-share table, be the scorecard. Watch this ratio above all — it is the heartbeat of a franchise earning a 20%-plus return on equity¹.