What began as a localized cooling-system problem at a single data center quickly cascaded into a global trading blackout. From index futures to energy and currency contracts — the outage frozen markets across asset classes. The incident underlined how fragile modern market infrastructure remains, especially for institutional traders and hedge funds relying on uninterrupted data flow for risk management. 

The situation was all the more complicated because the blackout occurred on the day of shortened trading after the US Thanksgiving holiday, known as Black Friday. Traditionally, markets are only open on this day on a limited basis, with liquidity being significantly lower and trading activity subdued. In such an environment, any sudden infrastructure outage increases the risk of abnormal price movements, as the reduced volumes cannot naturally absorb the increased amount of orders and changes in sentiment.

According to Reuters the outage was triggered by a problem in the cooling of data…