The production milestone is a significant achievement for Mullen Automotive, indicating that the company is advancing in its manufacturing process. This news is likely to be viewed positively by investors as it reflects progress in the company's operational goals. The completion of 125 trucks also suggests that Mullen is scaling up production, which could lead to increased sales and revenue in the future. However, the impact on the stock will also depend on broader market conditions and investor perceptions of the company's long-term prospects.