0001193125-10-234992 Sample Contracts

NUVEEN BUILD AMERICA BOND OPPORTUNITY FUND [—] Common Shares of Beneficial Interest ($[—] par value) UNDERWRITING AGREEMENT

Underwriting Agreement • October 25th, 2010 • Nuveen Build America Bond Opportunity Fund • New York

• Contract Type
  Underwriting Agreement
• Filed
  October 25th, 2010
• Company
  Nuveen Build America Bond Opportunity Fund
• Jurisdiction
  New York

INVESTMENT MANAGEMENT AGREEMENT

Investment Management Agreement • October 25th, 2010 • Nuveen Build America Bond Opportunity Fund • Illinois

• Contract Type
  Investment Management Agreement
• Filed
  October 25th, 2010
• Company
  Nuveen Build America Bond Opportunity Fund
• Jurisdiction
  Illinois

AGREEMENT made this day of , 2010, by and between Nuveen Build America Bond Opportunity Fund, a Massachusetts business trust (the “Fund”), and NUVEEN ASSET MANAGEMENT, a Delaware corporation (the “Adviser”).

NUVEEN BUILD AMERICA BOND OPPORTUNITY FUND Subscription Agreement

Subscription Agreement • October 25th, 2010 • Nuveen Build America Bond Opportunity Fund

• Contract Type
  Subscription Agreement
• Filed
  October 25th, 2010
• Company
  Nuveen Build America Bond Opportunity Fund

This Agreement made this October 19, 2010 by and between Nuveen Build America Bond Opportunity Fund, a Massachusetts business trust (the “Fund”), and Nuveen Asset Management (the “Subscriber”);