Form FWP for iShares Silver Trust

Free Writing Prospectus

Filed Pursuant to Rule 433

Registration No. 333-184107

December 11, 2012

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byBLACKROCIC

Investing in gold and silver

With continuing market uncertainty, many are looking to add differentiated sources of risk and return. For investors wanting to diversify their portfolio or hedge against a decline in the value of the dollar, commodities—like gold and silver—may be a solution. In our current low real rate environment, the opportunity cost of holding such assets is lower, making it a potentially advantageous play.

ETFs like the iShares Gold Trust (IALJ) and the iShares Silver Trust (SLV) can provide transparent and liquid access to the gold and silver markets.

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IShares Gold Trust (IAU)—the first gold ETF with 100% allocation daily H IAU Prospectus Learn more about investing in gold.

iShares Silver Trust (SLV)—simple and cost-effective access to the silver

IB SLV Prospectus

1-800-iShares (1-800-474-2737) | iShares.com Follow us C t ^m

iShares Gold Trust [the “Gold Trust”) has filetl a registration statement (incltitlinti a prospectus) with the SEC for tlhe offering to which this communication relates. Before you invest, you should read the prospectus and other documents the Gold Trust has filed with the SEC for more complete information about the issuer and this offering. You may get these documents for free by visiting www.iShares.com or EDGAR on the SEC website at www.sec.gov. Alternatively, the Gold Trust will arrange to send you the prospectus if you request it by calling toll-free 1-SOO-474-2737.

iShares Silver Trust [the “Silver Trust”) has filed a registration statement (including a prospectus) witti the SEC for the offering to which this communication relates. Before you invest, you should read the prospectus and other documents the Silver Trust has filed with the SEC for more complete information a bout the issuer and this offering. You may get these documents for free by visiting www.iShares.com or EDGAR on the SEC website at www.sec.gov. Alternatively, the Silver Trust will arrange to send you the prospectus if you request it by calling toll free 1-800-474-2737.

Investing involves risk, including possible loss of principal. Diversification may not protect against market risk. Neither the iShares Gold Trust nor the i Shares Silver Trust (collectively, the “Trusts*’} is an investment company registered under the Investment Company Act of 1940 or a commodity pool for purposes of the Commodity Exchange Act. Shares of the Trusts a re not subject to the same regulatory requirements as mutual funds. Because shares of the Trusts a re intended to reflect the price of the gold and silver held by the Gold Trust and the Silver Trust, respectively, the market price of the shares is subject to fluctuations similar to those affecting gold or silver prices. Additionally, shares of the Trusts are bought and sold at market price, not at net asset value (“NAV1’}. Brokerage commissions will reduce returns.

Shares of the Trusts are not deposits or other obligations of or guaranteed by BlacKRock,lnc.,and its affiliates, and are not insured by the Federal Deposit Insurance Corporation or any other governmental agency.

The sponsor of the trusts is iShares Delaware Trust Sponsor LLC (the “Sponsor”). BlackRock Investments. LLC (“BRIL”}, assists in the promotion of theTrusts. The Sponsor and BRIL are affiliates of BlackRock, Inc.

Although shares of the Trusts may be bought or sold on the secondary market through any brokerage account, shares of the Trusts are not redeem able from the Trusts except in large aggregated units called JBaskets\ Only registered broker-dealers that become authored participants by entering into a contract with the sponsor and the trustee of the Trusts may purchase or redeem Baskets.

Although market makers will generally take advantage of differences between the NAV and thetrading price of the Trusts’ shares through arbitrage opportunities, there is no guarantee that they will do 50. There is no guarantee an active trading market will develop for the shares, which may result in losses on your investment at the time of disposition of your shares. The value of the shares of the Trusts will be adversely affected if gold or silver owned by the trust is lost or damaged in circumstances in which the trust is not in a position to recover the corresponding loss. TheTrusts are passive investmentvehicles This means thatthevalue of yourshares may be adversely affected by trust losses that, if theTrusts had been actively managed, might have been avoidable.

Important Information Regarding an Investment in the iShares Gold Trust (“Gold Trust”)

Shares of the Gold Trust are intended to reflect, at any given time: the market price of gold owned by the trust at that time less the trust’s expenses and liabilities. The price received upon the sale of the shares, which trade at market price, may be more or less than thevalue of the gold represented by such shares. If an investor sells the shares at a time when no active market for them exists, such lack of an active market will most likely adversely affect the price received for the shares. Fora more complete discussion of the risk factors relative to the Gold Trust, carefully read the prospectus.

Following an investment in shares of the Gold Trust, several factors may have the effect of causing a decline in the prices of gold and a corresponding decline in the price of the shares. Among them: [ij Large sales by the official sector. A significant portion of the aggregate world gold holdings is owned by governments, central


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banks and related institutions. If one or more of these institutions decides to sell in amounts large enough to cause a decline in world gold prices, the price of the shares will be adversely affected. Mi; A significant increase in gold hedging activity by gold producers. Should there be an increase in the level of hedge activity of gold producing companies, it could cause a decline in world gold prices, adversely affecting the price of the shares. (Mi) A significant change in the attitude of speculators and investors towards gold Should the speculative community take a negative view towards gold, it could cause a decline in world gold prices, negatively impacting the price of the shares.

The amount of gold represented by shares of the Gold Trust will decrease over the life of the trust due to sales of gold necessary to pay the sponsor’s fee and trust expenses. Without increases in the price of gold sufficient to compensate for that decrease, the price of the shares will also decline, and investors will lose money on their investment. The Gold Trust will have limited duration. The liquidation of the trust may occur at a time when the disposition of the trust’s gold will result in losses to investors.

The trustee’s arrangements with the custodian contemplate that at the end of each business day there can be in the Gold Trust account at such custodian no gold in an unallocated form.

Important Information Regarding an Investment in the iShares Silver Trust r Silver Trust”)

Shares of the Silver Trust are intended to reflect, at any given time, the market price of silver owned by the trust at that time less the trust’s expenses and liabilities. The price received upon the sale of shares of the Silver Trust, which trade at market price, may be more or less than the value of the silver represented by such shares. If an investor sells the shares at a time when no active market for them exists, such lack of an active market will most likely adversely affect the price received for the shares. Fora more complete discussion of risk factors relative to the SilverTrust. carefully read the prospectus.

Following an investment in the Silver Trust, several factors may have the effect of causing a decline in the prices of silver and a corresponding decline in the price of the shares. Among them: (ij A change in economic conditions, such as a recession, can adversely affect the price of silver. Silver is used in a wide range of industrial applications, and an economic downturn could have a negative impact on its demand and. consequently, its price and the price of the shares, [iij A significant change in the attitude of speculators and investors towards silver. Should the speculative community take a negativeviewtowards silver, a decline in world silver prices could occur, negatively impacting the price of the shares. Mil: A significant increase in silver price hedging activity by silver producers. Traditionally, silver producers have not hedged to the same extent as other producers of precious metals (gold, for example! do. Should there be an increase in the level of hedge activity of silver producing companies, it could cause a decline in world silver prices, adversely affecting the price of the shares.

The amount of silver represented by shares of the Silver Trust will decrease over the life of the trust due to sales of silver necessary to pay the sponsor’s fee and trust expenses. Without increases in the price of silver sufficient to com pen sate for that decrease, the price of the shares will also decline, and investors will lose money on their investment. The Silver Trust will have limited duration. The liquidation of the trust may occur at a time when the disposition of the trust’s silver will result in losses to investors.

©2012 BlackRock. All rights reserved. i Shares1 and ElackRock*are registered trademarks of BlackRock. All other trademarks, servicemarks or registered trademarks are the property of their respective owners. IS-B723-1212

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