Municipal Bond New Issues

RE: $3,375,565.25*
SCHOOL DISTRICT NUMBER 6
Lake County, Illinois(Zion)
General Obligation School Bonds(Alternate Revenue
Source), Series 2007B

**** THIS ISSUE WILL BE IN BOOK ENTRY FORM THROUGH THE FACILITIES OF DTC ****

THIS IS A PRELIMINARY PRICING.

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MOODY’S: Aaa S&P: Not Applied For

AMBAC INSURED

DATED: 11/28/2007 FIRST COUPON: 06/01/2008

DUE: 12/01

TAKEDOWN
MATURITY AMOUNT* COUPON PRICE (pts)

12/01/2009 105M 4.00 % 3.40 1/4
12/01/2010 110M 4.00 % 3.42 1/4
12/01/2011 115M 4.00 % 3.50 1/4
12/01/2012 130M 4.00 % 3.57 1/4
12/01/2013 140M 4.00 % 3.66 3/8
12/01/2014 170M 4.00 % 3.73 3/8
12/01/2015 190M 4.00 % 3.83 3/8
12/01/2016 210M 4.00 % 3.94 1/2
12/01/2017 260M 4.00 % 4.04 1/2
12/01/2018 285M 4.25 % 4.18 1/2
(Approx. $ PTC 12/01/2017 100.567)

CALL FEATURES: Optional call in 12/01/2017 @ 100.00

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PREMIUM Capital Appreciation Bonds

APPROX.
$ PRICE
PRINCIPAL MATURITY YLD TO PER TAKEDOWN
MATURITY AMOUNT* VALUE MAT $100 (%)

12/01/2019 175,034.15 335M 4.56 58.191 1
12/01/2020 169,740 345M 4.64 55.063 1
12/01/2021 209,709 450M 4.71 52.092 1
12/01/2022 200,841.55 455M 4.78 49.215 1
12/01/2023 196,502.3 470M 4.85 46.433 1
12/01/2024 194,044.9 490M 4.89 43.968 1
12/01/2025 179,485 500M 4.93 41.601 1
12/01/2026 179,770.7 530M 4.96 39.403 1
12/01/2027 155,437.65 485M 5.00 37.227 1

CALL FEATURES: No optional call

* - APPROXIMATE SUBJECT TO CHANGE

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PRIORITY OF ORDERS AS FOLLOWS:
1. Member

PRIORITY POLICY:

The bonds will be blue skyed in all states.

Order period until 12:15 P.M., E.D.T., today, Monday, 11/05/07.

The manager reserves the right to terminate or extend the order period prior to
or later than the above mentioned time and date and to confirm bonds at their
discretion.

The compliance addendum MSRB Rule G-11 will apply.

Delivery is expected on November 28, 2007.

This issue is book entry through DTC.

UBS Securities LLC