Binh Duong province, the commercial and economic hub situated near Ho Chi Minh City, is witnessing an increase in real estate development, with a spread of projects implemented by builders from abroad. Agroundbreaking $418 million settlementannounced Friday by the powerful National Association of Realtors is ready to usher in the most sweeping reforms the American real estate market has seen in a century. It might dramatically drive down homebuyers’ prices — and push some real estate brokers out of business. A rule of thumb for mortgage rates is that buyers are extra sensitive to modifications in charges than to absolutely …