...Rating Outlook to Stable: Fitch Ratings recently revised BOK Financial Corp.'s (BOKF) Rating Outlook to Stable from Negative. The Outlook revision reflects BOKF's ability to reasonably control credit losses through a sustained energy price downturn; in Fitch's view, the bank's earnings and capital have not been materially impacted through the recent downturn. Strong Company Profile: Fitch considers BOK Financial Corp.'s (BOKF) business model and franchise as rating strengths and supportive of a higher rating relative to peers over time. In addition to its core banking franchise that has strong market share in BOKF's operating markets, the company offers trust, insurance agency, brokerage and investment banking services, all of which contribute to solid levels of fee income representing approximately half of total revenue. Unique Ownership: Fitch considers BOKF's unique ownership structure a credit strength. Tulsa businessman George Kaiser retains a majority 60% ownership interest of BOKF....