Protesters march on Wall Street, New York
6 October 2011 Last updated at 06:25 BST
Thousands of protesters have marched on New York's financial district, with rallies also held in other US cities.
Powerful unions gave a high-profile boost to the long-running demonstrations, as their members joined the rally in lower Manhattan.
Activists are concerned about high unemployment and social inequality.
The BBC's Laura Trevelyan reports from New York.