AUSTIN, Texas--(BUSINESS WIRE)--Fitch Ratings has assigned an 'AAA' rating to the following Crystal City Independent School District, Texas (the district) bonds: --$35 million unlimited tax (ULT) school building bonds, series 2015. The 'AAA' rating reflects the guarantee provided by the Texas Permanent School Fund (PSF), whose bond guarantee program is rated 'AAA' by Fitch. Additional information on the Texas PSF is available in Fitch's Sept. 4, 2014 press release, 'Fitch Affirms Texas PSF Rati