BOK Financial Purchases Rights to Service $4.1 Billion Mortgage Loans from Albuquerque-Based Charter Bank

The Acquisition Increases BOK Financial`s Existing Mortgage Activity and
Enhances Mortgage Servicing Market Share for Its Bank of Albuquerque Subsidiary
TULSA, Okla.--(Business Wire)--
Tulsa-based BOK Financial Corp. (NASDAQ: BOKF) has acquired the rights to
service a $4.1 billion portfolio of mortgage loans from Albuquerque-based
Charter Bank.

The 34,400 loans are largely concentrated in New Mexico, with the remainder
representing Texas, Oklahoma, Kansas, Arizona, Colorado and Idaho. The loans to
be serviced by BOK Financial are predominantly held by Fannie Mae, Freddie Mac
and Ginnie Mae. The acquisition will mean a 46% increase of BOK Financial`s
current $7.4 billion mortgage servicing portfolio.

"We are pleased to announce the completion of this acquisition," said BOK
Financial President and CEO Stan Lybarger. "This is an attractive portfolio and
we are eager to serve the needs of our new customers."

The acquisition follows a very successful year in 2009 for BOK Financial`s
mortgage group, which funded just over $3 billion in loans in 2009, up sharply
from $1.3 billion in 2008.

Although the acquisition is complete, the actual transfer of mortgage loans will
take place in early April. Prior to the transfer, in mid March, customers will
receive detailed communication explaining how to make mortgage payments in the
future. The advance communication will provide details about the exact date of
transfer and will provide contact information for questions.

"We have a local presence in Albuquerque, with a local mortgage team to meet
future mortgage needs. In addition, "Our mortgage servicing team is very
talented and we already service loans for most of these markets represented by
this acquisition," said Ben Cowen, President of BOK Financial`s mortgage group.

The full-service local market bank subsidiaries of BOK Financial provide the new
customers with additional options for service and also access to an expansive
set of products and services to address any additional financial needs they may
have. Approximately three quarters of the acquired mortgage loans are with
customers in New Mexico, where BOK Financial operates its Bank of Albuquerque
subsidiary.

"We are pleased to have this opportunity to welcome our new customers and are
confident they will enjoy working with our professional team of bankers," said
Bank of Albuquerque Chairman Jennifer Thomas.

About Bank of Albuquerque

Bank of Albuquerque offers the strength and diverse products and services of a
big bank with the thoughtful service style of a community bank. The bank offers
convenience, with 22 branch locations, 24-hour ExpressBank customer service and
7-day-a-week banking in select Albertsons stores. Customer service and more
information is available at 505.855.0855, online at www.bankofalbuquerque.com or
any branch location.

About BOK Financial Corp.

BOK Financial is a regional financial services company that provides commercial
and consumer banking, investment and trust services, mortgage origination and
servicing, and an electronic funds transfer network. Holdings include Bank of
Albuquerque, N.A., Bank of Arizona, N.A., Bank of Arkansas, N.A., Bank of
Oklahoma, N.A., Bank of Texas, N.A., Colorado State Bank & Trust, N.A., Bank of
Kansas City, N.A., BOSC, Inc., Cavanal Hill Investment Management, Inc., the
TransFund electronic funds network, and Southwest Trust Company, N.A. Shares of
BOK Financial are traded on the NASDAQ under the symbol BOKF. For more
information, visit www.bokf.com.

BOK Financial Corp.
Jesse Boudiette, 918-588-6532
or
Francie Monteith, 505-222-8488

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