As a cloud security specialist working for a financial institution, you are tasked with evaluating the security risks associated with the institution's cloud-based trading platform. The platform is hosted in a public cloud environment that serves multiple clients, including other financial institutions. Considering the sensitivity of financial data and the potential for illicit information gathering, which scenario would most likely elevate the risk of side-channel attacks within this multi-tenant infrastructure, and why is this scenario particularly concerning for the security of the trading platform?