New mainland restrictions on cross-border insurance purchases hit Asia-focused insurers hard, with Prudential down sharply and peers following suit. The latest move, tightening the tax net around mainland Chinese customers buying Hong Kong insurance products, just cost Prudential shareholders a painful Tuesday. For a company that built its growth story on selling life insurance and savings products to wealthy mainland visitors crossing into Hong Kong, that is not a rounding error. According to UBS, approximately 17% of Prudential’s group new business profit comes from Hong Kong insurance policies sold to mainland Chinese customers. Moving from general guidance to named decrees with tax implications signals that Beijing has moved from monitoring the behavior to actively penalizing it.