NEW YORK--(BUSINESS WIRE)--Fitch Ratings has assigned an initial long-term Issuer Default Rating (IDR) of 'BBB+' to Pershing Square Holdings, Ltd. (PSH) and an unsecured debt rating of 'BBB+(EXP)' to PSH's expected benchmark-sized senior unsecured debt issuance. The Rating Outlook is Stable. PSH is a publicly-traded closed-end fund externally managed by Pershing Square Capital Management, L.P. (PSCM), which generally co-invests alongside other PSCM-managed investment vehicles. With $6.8 billion