...Sale Date: Week of Aug. 28, 2017 via negotiation. Series: $30,075,000 Unlimited Tax Refunding Bonds, Series 2017. Purpose: Refund outstanding debt for savings. Security: The bonds are payable from an unlimited property tax levy and are further backed by the Permanent School Fund (PSF) bond guaranty program. For more information on the Texas PSF, see "Fitch Affirms Texas PSF Rating at `AAA'; Outlook Stable," dated July 21, 2017....