document: JP Morgan Chase and American Express were among the biggest risers on the Dow Jones index, up 2.01% and 1% respectively.
  Overall, the Dow was up 141.49 points or 0.66% at 21,452.15.
  The broader-based S&P 500 was 21.31 points or 0.88% higher at 2,440.69, while the tech-focused Nasdaq was up 87.79 points or 1.43% at 6,234.41.
summary: Wall Street shares closed higher on Wednesday, with financial stocks leading the way.