Field notes · 2026-03-12

Reading a Hong Kong motor loss triangle without drowning in noise

How claims leads can separate calendar-year noise from genuine severity shifts when preparing motor risk papers for a Hong Kong board.

Motor books in Hong Kong often look volatile month to month because repair costs, traffic patterns, and settlement timing move together. A loss triangle helps, but only if the reader knows which diagonal deserves attention.

Start with accident-year columns that match how your reserves are set. Many teams still mix report-year and accident-year views in the same pack, which confuses directors who only see the headline chart.

Focus commentary on three bands: attritional frequency, mid-severity bodily injury, and the thin tail of large property or liability spills. Annotate reopen spikes rather than burying them in footnotes.

When inflation in parts and labour is the real story, say so plainly. A tidy chart that hides labour inflation will be challenged in the first committee question.

Filehorizonbase uses this framing in Claims Portfolio Diagnostics so your motor pack stays readable for non-actuarial directors while remaining useful for reserving staff.