Which of the following is NOT a major component of Alibaba's ET Brain project?

Alibaba's ET Brain project is a comprehensive initiative that utilizes artificial intelligence and big data to tackle various challenges across different sectors. The core components of ET Brain include AI algorithms, big data analytics, and cloud services. These elements work together to provide insights, predictive analytics, and solutions tailored to specific industries such as healthcare, transportation, and urban management.

AI algorithms are essential as they allow systems to learn from data and make decisions, providing the intelligence behind the ET Brain's capabilities. Big data analytics is crucial for processing and analyzing the vast amounts of data collected from various sources, enabling effective decision-making and insights. Cloud services support the project by offering the necessary infrastructure to store and process data, ensuring scalability and accessibility.

While markets may be a context where ET Brain is applied, it is not a fundamental component of the project itself. Therefore, the correct response highlights that markets, although relevant to the overall ecosystem in which Alibaba operates, do not constitute a major component of the ET Brain initiative like the other key elements do.