US stocks on the move | Coinbase (COIN.US) to join the S&P 500 index, rising nearly 10% after hours.

According to the Securities Times APP, after the US stock market closed on May 12 (Monday), the largest cryptocurrency exchange in the United States, Coinbase (COIN.US), rose nearly 10% in after-hours trading. As of the time of writing, Coinbase rose by 9.41% to $226.72. On the news front, Standard & Poor's Dow Jones Indices company announced on Monday that cryptocurrency exchange Coinbase will be added to the S&P 500 index as a component stock on May 19.