Goldman Sachs Group chairman and chief executive Lloyd Blankfein said trading activity is picking up on Wall Street, thanks to a confluence of political and economic news.

"We're seeing an uptick in trading activity because the geopolitical activity creates some opportunity," Blankfein said Tuesday during a presentation at the Credit Suisse Financial Services Conference in Miami. "People are seeing the need to reform their portfolio" and "responding to macroeconomic events," he added.