The S&P/ASX 200 index gained 0.2% to reach 8,877 on Tuesday, marking its fourth straight day of upward momentum and attaining a high not seen in nearly two weeks. This rise came as investors awaited the Reserve Bank of Australia's decision on interest rates, anticipated to remain at 3.60%. Market participants are also focusing on a series of critical economic data due for release today, which includes building permits, housing statistics, PMI indicators, and trade data. Mining titans were among the leaders in the stock market, buoyed by a weakening US dollar and persistent supply concerns. Specifically, BHP Group saw an increase of 2.4%, and Rio Tinto grew by 2.3%. Additionally, the index was further supported by the positive performance of gold stocks; Northern Star Resources, Evolution Mining, and Perseus Mining reported gains from 1.8% to 2.4%. Conversely, the financial sector lagged, with the Commonwealth Bank of Australia and ANZ Group Holdings each dropping 1%, while National Australia Bank decreased by 0.5%, and Westpac Banking Corporation slipped by 0.4%.