The platform has been under pressure to keep up with market traffic. : Popular online trading platform Robinhood said Monday that it has lined up $3.4 billion to help meet its funding requirements amid a spike in trading on Wall Street fueled by small investors driving up shares in GameStop and other stocks. The funds are being provided by Ribbit Capital and several other venture capital firms, including Sequoia Capital, Index Ventures and ICONIQ Capital. The $3.4 billion figure includes $1 billion in funding that Robinhood announced Friday.