April 14 (Reuters) - U.S. stock indexes opened flat on Wednesday as Goldman Sachs and JPMorgan kicked off the first-quarter corporate earnings season, against the backdrop of a swift vaccine-led global economic recovery. The Dow Jones Industrial Average fell 8.32 points, or 0.02%, at the open to 33,668.95. The S&P 500 opened lower by 0.01 points, or -0.00%, at 4,141.58, while the Nasdaq Composite gained 7.98 points, or 0.06%, to 14,004.08 at the opening bell. (Reporting by Shivani Kumaresan in Bengaluru; Editing by Maju Samuel)