UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
Notice of Effectiveness
Effectiveness Date: August 25, 2021 4:00 P.M.
Form: S-3
CIK: 0001371571
Company Name: Invesco DB US Dollar Index Trust
File Number: 333-257258
CIK: 0001383151
Company Name: Invesco DB US Dollar Index Bullish Fund
File Number: 333-257258-01