The Labor Department's proposed rule allowing 401(k) plan fiduciaries to include alternative investments is now pending White House review. The final version would establish a safe harbor for plan sponsors who evaluate six key factors, including fees, liquidity, and valuation methods. If approved, the rule would open the door for retirement plans to incorporate assets such as private equity, real estate, and digital assets into their investment options, marking a significant shift in how American workers' retirement savings are managed.