Insider buying, particularly by high-level executives or board members, is typically viewed as a bullish signal by investors. It suggests that those with the most knowledge of the company's inner workings have faith in its future performance. This can lead to increased investor confidence and a rise in stock price, as seen with GSAT's recent movement to a 52-week high. The purchase by James Lynch is substantial and recent, which is likely to have a positive short-term impact on the stock's performance.