BLACKROCK ETF TRUST

100 Bellevue Parkway

Wilmington, Delaware 19809

March 14, 2019

VIA EDGAR

Securities and Exchange Commission

100 F Street, N.E.

Washington, D.C. 20549

Re: BlackRock ETF Trust

Pre-Effective Amendment No. 2

Securities Act File No. 333-228832                                 

Dear Commissioners:

Pursuant to Rule 461 under the Securities Act of 1933, BlackRock ETF Trust (the “Registrant”) requests acceleration of the effective date of Pre-Effective Amendment No. 2 to its Registration Statement on Form N-1A (File No. 333-228832) (the “Amendment”) so that the Amendment is declared effective at 9:30 a.m., Eastern Time, on March 15, 2019, or as soon as practicable thereafter. BlackRock Investments, LLC, the principal underwriter of the Registrant, hereby joins in its request for acceleration of the effectiveness of the Amendment.

If this request is granted, we respectfully request that we be notified by telephone at the time of effectiveness, and that such effectiveness also be confirmed in writing. Please call Jesse Kean of Sidley Austin LLP at (212) 839-8615.

Very truly yours,
BLACKROCK ETF TRUST
By:	/s/ John Perlowski
	Name: John Perlowski
	Title: Chief Executive Officer
BLACKROCK INVESTMENTS, LLC
By:	/s/ Jonathan Diorio
	Name: Jonathan Diorio
	Title: Managing Director