MACROshares Trusts Announce Three-for-One Stock Split

Madison, NJ—October 2, 2007

Macro Securities Depositor, LLC today announced a three-for-one split of the following:

MACROshares Oil Up Tradeable Trust (AMEX Ticker Symbol: UCR)

MACROshares Oil Up Holding Trust

MACROshares Oil Down Tradeable Trusts (AMEX Ticker Symbol: DCR)

MACROshares Oil Down Holding Trusts

These Trusts were formally known as Claymore MACROshares Oil Up and Claymore MACROshares Oil Down Tradeable and Holding Trusts.

Each shareholder of record at the close of business on October 19, 2007 will receive two additional shares for every one outstanding share held on the record date. The payable date for the additional shares will be October 22, 2007. Trading will begin on a split-adjusted basis on October 23, 2007.

This split will make MACROshares Oil Up and Down more accessible to investors. It is anticipated that this will increase liquidity to the market for UCR and DCR, while maintaining the relationship to the price performance of the NYMEX light sweet crude oil futures contract (crude oil).

MACROshares Oil Up and MACROshares Oil Down are revolutionary products that allow investors access to tracking the price performance of Crude Oil. The assets invested are placed into a Trust and invested in U.S. Treasuries or Overnight Repurchase Agreements, providing investors with a quarterly distribution. Therefore, MACROshares Oil Trusts seek to provide investors with the price performance of crude oil plus current income.

For More Information Contact:

MacroMarkets (888) Macros1

For Press Inquiries contact:

Diane Masucci (973) 889-1973 x103

Macro Securities Depositor, LLC is a Delaware limited liability company and is acting as the depositor for these trusts. A registration statement (including prospectus) has been filed with the Securities and Exchange Commission (SEC) for the offering to which this communication relates. Before you invest, you should read the prospectus in the registration statement and other documents the issuer has filed with the SEC for more complete information about the issuer and this offering. You may get these documents for free by visiting EDGAR on the SEC website at www.sec.gov. Alternatively, Macro Securities Depositor, LLC, any underwriter or dealer participating in the offering will arrange to send you the prospectus if you request by calling toll-free (800) 345-7999. You may also request a copy of the prospectus by accessing the MACROshares website at www.MacroMarkets.com.

MacroMarkets LLC is a pioneering financial products firm that has conceived and designed the MACROshares structure and holds multiple patents. MACROs represent a novel structure that can be applied to create securities or other financial instruments that tracks any asset class or economic indicator which can reliably indexed. The firm’s principal focus is to cultivate new markets which facilitate investment and risk management via innovative financial instruments. MacroMarkets’ subsidiary, Macro Financial, LLC, acts as a marketing agent for the MACROshares Holding and Tradeable Trusts. Macro Financial is registered with the SEC as a broker-dealer and is a member of the Financial Industry Regulatory Authority.

Important Risks

This Information does not represent an offer to sell securities of the MACROshares Holding and Tradeable Trusts and it is not soliciting an offer to buy securities of these Trusts. There can be no assurance that the Trusts will achieve their investment objectives. An investment in a MACROshare Holding or Tradeable Trust involves significant risks, including the risk of loss of substantially all of your investment. There is no guarantee as to the amount of any quarterly distribution or the amount of the final distribution to shareholders. You should review the risk factors in the prospectus prior to investing in a Holding or Tradeable Trust.

The Holding Trusts continuously offer shares through Authorized Participants. MACROshares Holding Shares may be converted to Claymore MACROshares Tradeable Shares, which can be bought and sold on the American Stock Exchange. There is no guarantee that a market for any MACROshares Holding or Tradeable Shares will continue.

Fluctuations in the underlying value of a Tradeable Trust or its related Holding Trusts and other factors may affect the market price of your MACROshares investment. An investment in a Tradeable Trust or its related Holding Trust will no resemble a direct investment in the asset being tracked. The price of the asset being tracked by a Tradeable Trust or its related Holding Trust may be volatile. It may be difficult to predict whether in the long-term the price of the asset being tracked will reflect a generally upward or downward trend. There are risks associated with investing in a product linked to a benchmark. A substitute price may be used as the reference price of the benchmark asset.

MacroMarkets LLC and its respective affiliates do not provide tax advice. Investors are urged to consult their tax advisor to fully understand the tax implications associated with and investment in any Tradeable Trust (or its related Holding Trust). Investors are hereby notified that: (A) any discussion of federal tax issues in this press release is not intended or written to be relied upon, and cannot be relied upon by investors for the purpose of avoiding penalties that may be imposed on investors under the Internal Revenue Code; (B) such discussion is being used in connection with the promotion or marketing by Macro Securities Depositor, LLC and the Holding and Tradeable Trusts of the transactions or matters addressed herein; and (C) investors should seek advice based on their particular circumstances from an independent tax advisor.

Additional Information about MACROshares Oil can be found at www.MacroMarkets.com

MACRO Securities Depositor, LLC 8-K