The BondBloxx Bloomberg 6 Month Target Duration US Treasury ETF is my preferred vehicle for cash management due to its ultra-low 0.03% expense ratio. XHLF's six-month duration offers near-cash stability with minimal interest rate risk, making it a strong substitute for cash allocations. Compared to alternatives like SHV, SGOV, and BIL, XHLF stands out primarily for its lower expense ratio, which materially improves long-term returns.