Typically, news of a regulatory deficiency notification might be expected to negatively impact a company's stock price due to concerns over potential compliance issues or financial instability. However, in this case, Momentus shares are trading higher, which could indicate investor confidence in the company's ability to resolve the filing delay or that the market had already priced in the impact of the delay. The positive stock movement in the short term suggests a bullish sentiment among investors despite the regulatory hiccup.