NEW YORK--(BUSINESS WIRE)--Fitch Ratings has affirmed the ratings of Lennar Corporation (NYSE: LEN), including the company's Issuer Default Rating (IDR), at 'BB+'. The Rating Outlook has been revised to Positive from Stable. A complete list of rating actions is provided at the end of this release. KEY RATING DRIVERS The ratings for Lennar are based on the company's strong track record over the past 40+ years, geographic diversity, customer and product focus, generally conservative building prac