The AUS200, also known as the ASX 200, is a Stock Market index that represents the 200 largest publicly traded companies listed on the Australian Securities Exchange (ASX) by market capitalization. It serves as a benchmark for the Australian equity market and reflects the performance of major sectors within the economy. The index is widely used by investors to gauge market trends and make investment decisions. Changes in the index are influenced by various factors, including economic conditions, corporate earnings, and investor sentiment.