**Recent DDoS attacks and infrastructure issues have driven multiple ChatGPT incidents throughout September 2026, shaping trader views toward two outage days as the leading outcome at 53% implied probability.** OpenAI confirmed distributed denial-of-service attacks linked to abnormal traffic patterns, producing errors such as "something seems to have gone wrong" and elevated failure rates that affected the chatbot, API, and image generation tools. Incidents spanned early-month routing errors on September 3, followed by partial outages and degraded performance from September 13–19, including major disruptions on Wednesday and Saturday tied to the attacks claimed by groups like Anonymous Sudan. Traders appear to count roughly two days of notable downtime so far while monitoring mitigation progress and any late-month escalation. With the month still underway, additional high-demand spikes or unresolved attacks remain swing factors that could shift probabilities toward three or more days.