OLDWICK, N.J.–(BUSINESS WIRE)–AM Best has upgraded the Long-Term Issuer Credit Rating (Long-Term ICR) to “bb+” (Fair) from “bb” (Fair) and affirmed the Financial Strength Rating (FSR) of B (Fair) of Tower Bonding and Surety Co., Inc. (Tower Bonding) (San Juan, PR). The outlook of the Long-Term ICR has been revised to stable from positive, while the outlook of the FSR is stable.The Credit Ratings (ratings) reflect Tower Bonding’s balance sheet strength, which AM Best assesses as adequate, as we