Nuveen Asset Management

333 West Wacker Drive

Chicago, IL 60606

Phone: 312-917-7700

www.nuveen.com

November 19, 2010

OVERNIGHT DELIVERY AND EDGAR

John Grzeskiewicz

Senior Counsel

Division of Investment Management

Securities and Exchange Commission

100 F Street, N.E.

Washington, D.C. 20549

Nuveen Build America Bond Opportunity Fund

Registration Statement on Form N-2

File Nos. 333-167407 and 811-22425

Dear Mr. Grzeskiewicz:

In accordance with Rule 461 of the General Rules and Regulations under the Securities Act of 1933, as amended, Nuveen Build America Bond Opportunity Fund (the “Fund”) hereby requests acceleration of the effective date of the above-captioned Registration Statement so that it will become effective by 10.00 a.m., Eastern Time, on November 23, 2010 or as soon thereafter as practicable.

The Fund also hereby requests that effectiveness of its Registration Statement on Form 8-A under the Securities Exchange Act of 1934, as amended, be accelerated to be concurrent with the effectiveness of the above-captioned Registration Statement.

Sincerely,
NUVEEN BUILD AMERICA BOND OPPORTUNITY FUND
By:	/s/    KEVIN J. MCCARTHY
	Kevin J. McCarthy
	Vice President and Secretary

[CITIGROUP GLOBAL MARKETS INC. LETTERHEAD]

VIA EDGAR

November 19, 2010

John Grzeskiewicz

Senior Counsel

Division of Investment Management

Securities and Exchange Commission

100 F Street, N.E.

Washington, D.C. 20549

Nuveen Build America Bond Opportunity Fund

Registration Statement on Form N-2

File Nos. 333-167407 and 811-22425

Dear Mr. Grzeskiewicz:

Pursuant to Rule 460 of the General Rules and Regulations under the Securities Act of 1933, as amended, we, on behalf of the several underwriters, wish to advise you that distribution of the Registration Statement on Form N-2 as filed on October 25, 2010 and the Preliminary Prospectus dated October 25, 2010, began on October 25, 2010 and is expected to conclude at approximately 5:00 p.m., Eastern Time, on November 23, 2010, with anticipated distribution results as follows: a limited number of Registration Statements have or will be sent to underwriters and approximately 130,000 copies of the Preliminary Prospectus have or will be sent to underwriters, dealers and institutions.

In accordance with Rule 461 of the General Rules and Regulations under the Securities Act of 1933, as amended, the undersigned, on behalf of the underwriters of the offering of shares of common stock of the Fund, hereby joins in the request of the Fund for acceleration of the effective date of the above-named Registration Statement so that it becomes effective at 10:00 a.m., Eastern Time, on November 23, 2010 or as soon thereafter as practicable.

Sincerely,
CITIGROUP GLOBAL MARKETS INC.
As Representative
By:	CITIGROUP GLOBAL MARKETS INC.
By:	/s/ Kevin Deignan
	Name: Kevin Deignan
	Title: Managing Director