
UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933		SEC USE ONLY
		DOCUMENT SEQUENCE NO.
		CUSIP NUMBER
		WORK LOCATION

ATTENTION:

Transmit for filing 3 copies of this form concurrently with either placing an order with a broker to execute sale or executing a sale directly with a market maker.

1(a) NAME OF ISSUER (Please type or print)

Nuveen Build America Bond Opportunity Fund

(b) IRS IDENT. NO.

27-3671063

(c) S.E.C. FILE NO.

811-22425

1(d) ADDRESS OF ISSUER

STREET

CITY

STATE

ZIP CODE

(e) TELEPHONE NO.

AREA CODE

NUMBER

333 West Wacker Drive

Chicago

60606

312

917-7700

2(a) NAME OF PERSON FOR WHOSE ACCOUNT
THE SECURITIES ARE TO BE SOLD

Nuveen Fund Advisors, LLC

(b) RELATIONSHIP TO ISSUER

See note 1

(c) ADDRESS

333 West Wacker Drive

STREET

CITY

Chicago

STATE

ZIP CODE

60606

INSTRUCTION: The person filing this notice should contact the issuer to obtain the I.R.S. Identification Number and the S.E.C. File Number.

3(a)

(b)

SEC USE ONLY

(c)

(d)

(e)

(f)

(g)

Title of the

Class of

Securities

To Be Sold

Name and Address of Each Broker Through Whom

the Securities are to be Offered or Each Market

Maker who is Acquiring the Securities

Broker-Dealer

File Number

Number of Shares

or Other Units

To Be Sold

(See instr. 3(c))

Aggregate

Market Value

(See instr. 3(d))

Number of Shares

or Other Units

Outstanding

(See instr. 3(e))

Approximate

Date of Sale

(See instr. 3(f))

(MO. DAY YR.)

Name of Each

Securities

Exchange

(See instr. 3(g))

Common

Stifel, Nicolaus & Company, Incorporated

501 North Broadway

St. Louis, MO 63102

5,250

$113,767.50

7,205,250.00

5/11/2017

NYSE


INSTRUCTIONS:
1.	(a)	Name of issuer
	(b)	Issuer’s I.R.S. Identification Number
	(c)	Issuer’s S.E.C. file number, if any
	(d) (e)	Issuer’s address, including zip code Issuer’s telephone number, including area code

2.	(a)	Name of person for whose account the securities are to be sold
	(b)	Such person’s relationship to the issuer (e.g., officer, director, 10% stockholder, or member of immediate family of any of the foregoing)
	(c)	Such person’s address, including zip code



3.	(a)	Title of the class of securities to be sold
	(b)	Name and address of each broker through whom the securities are intended to be sold
	(c)	Number of shares or other units to be sold (if debt securities, give the aggregate face amount)
	(d)	Aggregate market value of the securities to be sold as of a specified date within 10 days prior to the filing of this notice
	(e)	Number of shares or other units of the class outstanding, or if debt securities the face amount thereof outstanding, as shown by the most recent report or statement published by the issuer Approximate date on which the securities are to be sold
	(f)
	(g)	Name of each securities exchange, if any, on which the securities are intended to be sold

TABLE I—SECURITIES TO BE SOLD

Furnish the following information with respect to the acquisition of the securities to be sold

and with respect to the payment of all or any part of the purchase price or other consideration therefor:

Title of

the Class

Date you

Acquired

Nature of Acquisition Transaction

Name of Person from Whom Acquired

(If gift, also give date donor acquired)

Amount of
Securities Acquired

Date of

Payment

Nature of
Payment

Common

10/19/2010

Seed Capital

Issuer

5,250

10/19/2010

Cash

INSTRUCTIONS:

If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

TABLE II—SECURITIES SOLD DURING THE PAST 3 MONTHS

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

Name and Address of Seller

Title of Securities Sold

Date of Sale

Amount of
Securities Sold

Gross Proceeds

REMARKS:


Note 1:		Nuveen Asset Management, the original investment adviser to Nuveen Build America Bond Opportunity Fund, acquired 5,250 common shares of the Issuer on October 19, 2010 in connection with a seed capital transaction. Effective January 1, 2011, Nuveen Asset Management changed its name to Nuveen Fund Advisors, Inc. Effective December 31, 2012, Nuveen Fund Advisors, Inc. was reorganized into Nuveen Fund Advisors, LLC, the Issuer’s current investment adviser, and the common shares of the Issuer held by Nuveen Fund Advisors, Inc. became the property of Nuveen Fund Advisors, LLC by operation of law.


INSTRUCTIONS: See the definition of “person” in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.		ATTENTION: The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.

May 10, 2017 DATE OF NOTICE		/s/ Gifford R. Zimmerman (SIGNATURE)
DATE OF PLAN ADOPTION OR GIVING OF INSTRUCTION, IF RELYING ON RULE 10B5-1		Nuveen Fund Advisors LLC, By Gifford R. Zimmerman as Managing Director and Assistant Secretary The notice shall be signed by the person for whose account the securities are to be sold. At least one copy of the notice shall be manually signed. Any copies not manually signed shall bear typed or printed signatures.

Nuveen Build America Bond Opportunity Fund 144