Rocket Lab USA, Inc. (RKLB) experienced a significant pre-market plunge of 5.08% on Wednesday. The sharp decline followed a volatile session where the stock had risen sharply in the previous trading day.

The drop is directly attributed to the company's announcement that it has entered into an equity distribution agreement to sell up to $1 billion of its common shares. The filing for this "at-the-market" offering was made after the closing bell on Tuesday, with several major brokerages named as sales agents.

While the company stated the move aims to bolster its balance sheet for long-term initiatives, investors reacted negatively to the potential dilution of existing shares. Rocket Lab reported having substantial cash reserves, but the market typically views large equity offerings as a negative catalyst in the short term, leading to the pre-market sell-off.