OLDWICK, N.J.–(BUSINESS WIRE)–A.M. Best has commented that the Long-Term Issuer Credit Rating of “bbb” and the Long-Term Issue Credit Ratings on the debt and preferred equity of Fairfax Financial Holdings Limited (Fairfax) [TSX: FFH and FFH.U] (Toronto, Canada) are unchanged following an announcement that it has entered into a merger agreement under which Fairfax will acquire Allied World Assurance Company Holdings AG (Allied World) [NYSE: AWH] for a total equity value of approximately USD 4.