Which behavior might lead to the revocation or denial of security clearance?

Involvement in suspicious financial activities is a significant concern when it comes to security clearance. Individuals holding security clearances are expected to demonstrate reliability, trustworthiness, and good judgment. Financial difficulties or questionable financial behavior can raise red flags about a person's vulnerability to coercion, bribery, or exploitation by foreign entities or adversaries. This is based on the understanding that financial instability might lead someone to act in ways that do not align with national security interests. Therefore, activities that suggest financial irresponsibility can directly impact the evaluation of a candidate’s eligibility for a security clearance.

While other behaviors may contribute to concerns about a person's fitness for clearance, they do not align as directly with the core issues assessed during the security clearance review process as suspicious financial activities do.