High-frequency trading, which constitutes half of US securities trading, relies heavily on robust computer systems to automate trades effectively, but failures can lead to significant financial losses, as demonstrated by Knight Capital's $460 million loss in 2012 due to a software deployment error. The incident highlighted the importance of implementing best practices in IT incident management, such as setting financial thresholds to prevent excessive trading beyond capital capacity, creating a responsive people process to ensure timely intervention when alerts are triggered, and learning from previous incidents to improve control measures and prevent future errors. Knight Capital's lack of adequate procedures and supervision during the deployment of a new code led to a failure to address alerts promptly, exacerbating the problem, and their prior $7.5 million loss in 2011 was a missed opportunity to enhance their systems' resilience and prevent the much larger loss the following year. The cyclical process of setting thresholds, involving the right personnel, and applying lessons from past incidents is essential to maintaining efficient incident management and minimizing financial and reputational damage.