Top High Interest Short Term Investment Options for 2026
High Interest Savings Accounts for Liquid Cash Buffers Cash sleeve purpose and liquidity role High interest Savings Accounts (HISAs) in Australia often serve as a default “cash buffer” because they offer daily access combined with an interest rate that can change along with the market. This makes them a popular choice. By the end of 2025, the Reserve Bank of Australia had set the cash rate target at 3.60% and it looked like there would be a few more decisions to come before early 2026. As a result, short term cash yields are still going to be pretty sensitive to changes in policy and bank competition. The demand for liquidity has been pretty high lately. APRA banking data shows that Australian household bank deposits totalled $1.64 trillion in 2025, with a $35 billion increase . This is a clear sign of how important liquidity is in decision making, especially when things get a bit unstable. Deposit repricing drivers and realised yield When it comes to a HISA, the headline rate is jus...