Pursuant to Section 19(b)(1) of the Securities Exchange Act of 1934 (“Act”),^[1] and Rule 19b-4 thereunder,^[2] notice is hereby given that on May 24, 2018, Cboe BZX Exchange, Inc. (the “Exchange” or “BZX”) filed with the Securities and Exchange Commission (“Commission”) the proposed rule change as described in Items I and II below, which Items have been prepared by the Exchange. The Commission is publishing this notice to solicit comments on the proposed rule change from interested persons.

I. Self-Regulatory Organization's Statement of the Terms of Substance of the Proposed Rule Change

The Exchange filed a proposal to amend a representation made in a proposed rule change previously approved by the Commission relating to the listing and trading of the iShares Inflation Hedged Corporate Bond ETF (the “Fund”).

The text of the proposed rule change is available at the Exchange's website at www.markets.cboe.com, at the principal office of the Exchange, and at the Commission's Public Reference Room.

II. Self-Regulatory Organization's Statement of the Purpose of, and Statutory Basis for, the Proposed Rule Change

In its filing with the Commission, the Exchange included statements concerning the purpose of and basis for the proposed rule change and discussed any comments it received on the proposed rule change. The text of these statements may be examined at the places specified in Item IV below. The Exchange has prepared summaries, set forth in Sections A, B, and C below, of the most significant parts of such statements.

A. Self-Regulatory Organization's Statement of the Purpose of, and Statutory Basis for, the Proposed Rule Change

1. Purpose

The shares of the Fund (the “Shares”) were approved for listing and trading on the Exchange under Rule 14.11(i), which governs the listing and trading of Managed Fund Shares.^[3] The Shares have commenced trading on the Exchange. The Fund is a series of the iShares U.S. ETF Trust (the “Trust”), which was established as a Delaware statutory trust on June 21, 2011. BlackRock Fund Advisors (the “Adviser”) is the investment adviser to the Fund. The Trust is registered with the Commission as an open-end management investment company and has filed a registration statement on behalf of the Fund on Form N-1A (“Registration Statement”) with the Commission.^[4]

The Exchange proposes to amend a representation made in the Approval Order such that the representation that limits Fund holdings in Inflation Hedging Instruments ^[5] to 50% of the weight of its portfolio (including gross notional exposure) would instead limit the Fund's holdings in Inflation Hedging Instruments to 60% of the weight of its portfolio (including gross notional exposure). While the Fund generally expects to have approximately 50% of the weight of its portfolio (including gross notional exposure) in Inflation Hedging Instruments, the Adviser would prefer to allow the Fund the flexibility to increase to 60% in order to allow for potential market movement in the Fund's holdings. Specifically, the Exchange is proposing to change the sentence that reads:

The Exchange believes that this proposed change is a non-controversial change because it is intended only to provide the Adviser with additional flexibility within the Fund's portfolio to hedge inflation risk associated with its exposure to corporate bonds. The Fund's investment objective and investment strategy are not changing. Further to this point, all other representations in the Approval Order that constitute Continued Listing Representations ^[6] for the Fund remain true and will apply on a continuous basis, consistent with Rule 14.11 and the proposed change to the representation above will be a Continued Listing Representation for the Fund going forward. The Exchange also notes that the statements in the filing that formed the basis for the Commission approving the Fund for listing and trading remain true. As such, the Exchange believes that the proposal does not raise any substantive issues that were not previously addressed in the Approval Order.

2. Statutory Basis

The Exchange believes that the proposal is consistent with Section 6(b) of the Act ^[7] in general and Section 6(b)(5) of the Act ^[8] in particular in that it is designed to prevent fraudulent and manipulative acts and practices, to promote just and equitable principles of trade, to remove impediments to, and perfect the mechanism of a free and open market and, in general, to protect investors and the public interest. Specifically, the Exchange believes that the proposal is designed to prevent fraudulent and manipulative acts and ( printed page 26532) practices, to promote just and equitable principles of trade, to remove impediments to, and perfect the mechanism of a free and open market and, in general, to protect investors and the public interest.

As described above, all of the Continued Listing Representations which formed the basis for the Commission approving the Approval Order remain true and will continue to constitute Continued Listing Representations for the Fund with the exception of the single representation that the Exchange is proposing to amend, which, as amended, will be a Continued Listing Representation for the Fund going forward. This proposed change will only provide the Adviser with additional flexibility within the Fund's portfolio to hedge inflation risk associated with its exposure to corporate bonds. The Fund's investment objective and investment strategy are not changing. As such, the Exchange believes that the proposal does not raise any substantive issues that were not previously addressed in the Approval Order.

Based on the foregoing, the Exchange believes that the proposal is designed to prevent fraudulent and manipulative acts and practices, to promote just and equitable principles of trade, to remove impediments to and perfect the mechanism of a free and open market and a national market system, and, in general, to protect investors and the public interest because there are no substantive issues raised by this proposal that were not otherwise addressed by the Approval Order.

B. Self-Regulatory Organization's Statement on Burden on Competition

The Exchange does not believe that the proposed rule change will impose any burden on competition that is not necessary or appropriate in furtherance of the purposes of the Act. The Exchange believes that adding the flexibility to fully implement the Fund's hedging strategy will have no impact on competition.

C. Self-Regulatory Organization's Statement on Comments on the Proposed Rule Change Received From Members, Participants or Others

The Exchange has neither solicited nor received written comments on the proposed rule change.

III. Date of Effectiveness of the Proposed Rule Change and Timing for Commission Action

Because the foregoing proposed rule change does not: (i) Significantly affect the protection of investors or the public interest; (ii) impose any significant burden on competition; and (iii) become operative for 30 days from the date on which it was filed, or such shorter time as the Commission may designate, it has become effective pursuant to Section 19(b)(3)(A)(iii) of the Act ^[9] and subparagraph (f)(6) of Rule 19b-4 thereunder.^[10]

A proposed rule change filed pursuant to Rule 19b-4(f)(6) under the Act ^[11] normally does not become operative for 30 days after the date of its filing. However, Rule 19b-4(f)(6)(iii) ^[12] permits the Commission to designate a shorter time if such action is consistent with the protection of investors and the public interest. The Exchange has asked the Commission to waive the 30-day operative delay so that the proposed rule change may become effective and operative immediately upon filing. The Exchange states that waiver of the operative delay would permit the Adviser of the Fund to immediately employ the Adviser's strategy for hedging against inflation risk. According to the Exchange, this hedging strategy will best allow the Fund to achieve its investment objective and employ its investment strategy.

The Commission believes that waiving the 30-day operative delay is consistent with the protection of investors and the public interest. The proposal raises no new novel issues. Moreover, as the noted above, apart from increasing the Fund's holdings in Inflation Hedging Instruments to 60% of the weight of its portfolio (including gross notional exposure), all other representations in the Approval Order that constitute Continued Listing Representations for the Fund would remain true and will apply on a continuous basis. Further, the proposed change to the representation above will be a Continued Listing Representation for the Fund going forward. Accordingly, the Commission hereby waives the operative delay and designates the proposal operative upon filing.^[13]

At any time within 60 days of the filing of the proposed rule change, the Commission summarily may temporarily suspend such rule change if it appears to the Commission that such action is: (i) Necessary or appropriate in the public interest; (ii) for the protection of investors; or (iii) otherwise in furtherance of the purposes of the Act. If the Commission takes such action, the Commission shall institute proceedings to determine whether the proposed rule should be approved or disapproved.

IV. Solicitation of Comments

Interested persons are invited to submit written data, views and arguments concerning the foregoing, including whether the proposal is consistent with the Act. Comments may be submitted by any of the following methods:

Electronic Comments

• Use the Commission's internet comment form (http://www.sec.gov/​rules/​sro.shtml); or
• Send an email torule-comments@sec.gov. Please include File Number SR-CboeBZX-2018-036 on the subject line

Paper Comments

• Send paper comments in triplicate to Secretary, Securities and Exchange Commission, 100 F Street NE, Washington, DC 20549-1090.

( printed page 26531) June 1, 2018.

The Exchange is proposing to allow the Fund to hold up to 50% of the weight of its portfolio (including gross notional exposure) in Inflation Hedging Instruments, collectively, in a manner that may not comply with Rules 14.11(i)(4)(C)(iv)(a), 14.11(i)(4)(C)(iv)(b), and/or 14.11(i)(4)(C)(v), as discussed above.

The Exchange is proposing to replace that sentence with the following:

The Exchange is proposing to allow the Fund to hold up to 60% of the weight of its portfolio (including gross notional exposure) in Inflation Hedging Instruments, collectively, in a manner that may not comply with Rules 14.11(i)(4)(C)(iv)(a), 14.11(i)(4)(C)(iv)(b), and/or 14.11(i)(4)(C)(v), as discussed above.

All submissions should refer to File Number SR-CboeBZX-2018-036. This file number should be included on the subject line if email is used. To help the Commission process and review your comments more efficiently, please use only one method. The Commission will post all comments on the Commission's internet website ( http://www.sec.gov/​rules/​sro.shtml). Copies of the submission, all subsequent amendments, all written statements with respect to the proposed rule change that are filed with the Commission, and all written communications relating to the proposed rule change between the Commission and any person, other than those that may be withheld from the public in accordance with the provisions of 5 U.S.C. 552, will be available for website viewing and printing in the Commission's Public Reference Room, 100 F Street NE, Washington, DC 20549, on official business days between the hours of 10:00 a.m. and 3:00 p.m. Copies of the filing will also be available for inspection and copying at the principal office of the Exchange. All comments received will be posted without change. Persons submitting comments are cautioned that we do not redact or edit personal identifying information from comment submissions. You should ( printed page 26533) submit only information that you wish to make available publicly. All submissions should refer to File Number SR-CboeBZX-2018-036 and should be submitted on or before June 28, 2018.