Momentus Inc. (MNTS) is learning that what goes up quickly can come down just as fast. Shares of the commercial space company faced heavy selling pressure on Monday, erasing some of last week's impressive gains after a catalyst that briefly captured investor attention.

What Sparked the Initial Surge?

Last week brought exciting news for Momentus: the company announced it was developing an additive manufactured fuel tank with Velo3D. That might not sound like blockbuster material, but here's the kicker—Velo3D confirmed last month it's actively printing parts for SpaceX's next-generation Raptor 4 engine. Any association with SpaceX tends to make investors perk up.

The fuel tank collaboration will be tested aboard the Momentus Vigoride-7 Orbital Service Vehicle, demonstrating how additive manufacturing can accelerate innovation in spacecraft design. By using Velo3D's fully integrated solution, Momentus designed and produced a tank with optimized features that would be difficult or impossible to achieve through traditional manufacturing methods.

Shares responded enthusiastically, nearly doubling from roughly $8 to approximately $16 at the peak. The momentum continued throughout the week before hitting resistance. Monday's pullback appears technical in nature, with shares now filling the gap on the chart from the initial surge.

The Longer-Term Picture Isn't Pretty

While last week's rally was impressive, zoom out and the view gets sobering. Momentus has faced significant challenges over the past year, with shares down approximately 91.18% from their 12-month high of $160.65. That kind of decline highlights the volatility and risks associated with the stock, even when it experiences brief rallies.

The technical indicators paint a mixed picture. Momentus is currently trading 13.5% above its 20-day simple moving average but remains 42.8% below its 100-day SMA, indicating a struggle to regain longer-term momentum.

The RSI sits at 55.48, which is neutral territory—the stock isn't overbought or oversold at this moment. Meanwhile, MACD is above its signal line, indicating bullish momentum that could support further price increases if shares can bounce in the coming days. The combination suggests some positive pressure exists, but it may not be enough to sustain a strong upward trend.

Key levels to watch: resistance at $10.50 and support at $9.50.

A High-Flyer With a Small Float

According to market data, Momentus scores 85 out of 100 on momentum metrics, indicating the stock is outperforming the broader market despite its challenges. That's a classic "High-Flyer" setup—strong momentum but with limited additional fundamental support.

Here's what really matters for understanding this stock's wild swings: Momentus had a market cap of just $20.8 million as of Monday's close, with a total float of only 1.67 million shares. Low-float micro-cap stocks tend to be extremely volatile. Small bursts of buying interest can send shares soaring, while modest selling pressure can trigger dramatic pullbacks.

For investors considering longer-term positions, waiting for additional company updates before making investment decisions might be the prudent approach. The strong momentum signal confirms the trend, but the lack of substantial fundamental catalysts beyond the Velo3D partnership suggests caution.

MNTS Price Action: Momentus shares closed Monday down 17.01% at $10.34.