Rocket Lab is set to join the Nasdaq-100 index, a development that has led to a surge in its stock. However, there is some uncertainty as reports also mention SpaceX in relation to the Nasdaq-100 index, with some outlets suggesting SpaceX is joining the index, while others focus on Rocket Lab's inclusion. The impact of this development on Rocket Lab's stock is also unclear, with some reports indicating a surge and others a tumble.