Receiving a delisting determination letter from Nasdaq is a significant negative regulatory event that directly impacts a company's standing on the stock exchange. For Knightscope, this event is likely to lead to a decrease in stock price due to the potential loss of the Nasdaq platform for trading, which could also erode investor confidence. The direct mention of Knightscope and the specific nature of the regulatory issue make this news highly relevant and important for investors in KSCP.