Rocket Lab stock is among today’s weakest performers. What’s weighing on RKLB shares?

What Does Rocket Lab’s Nasdaq-100 Inclusion Mean?Rocket Lab officially joined the Nasdaq-100 on Monday, a change that forces index-tracking funds and ETFs, including Invesco QQQ, which manages over $300 billion, to own the stock. The inclusion comes after a choppy stretch for space-sector proxies following Space Exploration Technologies Corp (SpaceX) IPO day on June 12, when RKLB sold off as capital rotated toward the new listing.Rocket Lab Shatters Records with VICTUS HAZEMeanwhile, Rocket Lab late Monday launched the U.S. Space Force’s VICTUS HAZE mission 16 hours and 42 minutes after receiving the official Notice to Launch, reducing the previous record by more than 10 hours. The company managed all operational phases of this mission, providing an end-to-end space service that encompassed spacecraft design, component fabrication, launch, and ongoing 24/7 on-orbit management. The deployed Pioneer spacecraft is now fully commissioned and executing orbital maneuvers. The vehicle is currently conducting Rendezvous and Proximity Operations (RPO) to track another active spacecraft in low Earth orbit.RKLB Stock: Key Technical Levels To WatchFrom a trend perspective, RKLB is still in a bullish long-term structure—up 194.39% over the past 12 months and trading 29.7% above its 200-day SMA at $74.34—but the near-term tape is correcting. The stock is now 17.8% below its 20-day SMA ($117.27) and 8.3% below its 50-day SMA ($105.15), which frames the current move as a pullback inside a broader uptrend rather than a confirmed trend break.Momentum is the main watch item: MACD is below its signal line and the histogram is negative, which points to upside pressure fading versus the prior upswing. In plain terms, MACD compares faster and slower trend momentum, and being below the signal line often means rallies can stall until buyers regain control.