1 The "offer" price represents the net asset value of one unit of a trust plus a transactional sales charge, if applicable.

2 The "bid" price represents the net asset value of one unit of a trust excluding deferred sales charge, if applicable.

3 The "liquidation" price represents the net asset value of one unit of a trust and includes any front-end and deferred sales charges, if applicable, accounted for if investors liquidate units.

4 Estimated Annual Income per Unit is computed by dividing the estimated annual income of the underlying bonds by the number of units outstanding. The amount may be lower or greater than the above-stated amount due to certain factors that may include, but are not limited to, the selling of bonds to pay for the deferred sales charge, a change in Trust expenses or the sale or maturity of securities in the portfolio. Fees and expenses of the Trust may vary as a result of a variety of factors including the Trust's size, redemption activity, brokerage and other transaction costs and extraordinary expenses.

5 ECR is computed by dividing the estimated net annual interest income per unit by the public offering price. ELTR is calculated using a formula that (i) takes into consideration, and determines and factors in the relative weightings of, the market values, yields (taking into account the amortization of premiums and the accretion of discounts) and estimated retirements of all the bonds in the trust and (ii) takes into account the expenses and sales charge associated with each unit of the trust. Therefore, there is no assurance that the ECR and ELTR will be realized in the future.

6 The Historical Annual Dividend Distribution is as of date of deposit. The amount of distributions of the Trust may be lower or greater than the above-stated amount due to certain factors that may include, but are not limited to, a change in the dividends paid by issuers, a change in Trust expenses or the sale or maturity of securities in the portfolio. Fees and expenses of the Trust may vary as a result of a variety of factors including the Trust's size, redemption activity, brokerage and other transaction costs and extraordinary expenses.

† Anticipated date of deposit. Information contained herein and in the preliminary prospectus is subject to completion or amendment. A registration statement relating to these securities has been filed with the Securities and Exchange Commission, but has not yet become effective. These securities may not be sold nor may offers to buy be accepted prior to the time the registration statement becomes effective. This communication shall not constitute an offer to sell or a solicitation of any offer to buy; nor shall there be any sale of these securities in any state in which such offer, solicitation, or sale would be unlawful prior to registration or qualification under the securities laws of any such state.

* - The Closed-End California Municipal Portfolio Series 4 Historical Annual Dividend Distribution was updated as of February 11, 2011.

Past performance does not guarantee future results. Investment return and principal value will fluctuate with changes in market conditions. Investors units, when redeemed, may be worth more or less than their original cost.