Since 2013, Congress has mandated that rates on federal student loans issued to new borrowers be adjusted once a year, on July 1, using yields on 10-year Treasury notes auctioned in May as the base rate. It’s a system that’s intended to take into account the government’s own borrowing costs, and remove politics from the equation.
Under this system, rates on federal student loans are automatically recalibrated once a year, based on the outcome of an auction of Treasury notes that’s held in May. Investor demand for Treasurys determines yields that are plugged into a formula that generates federal student loan rates for undergraduates, graduate students, and parents for the following academic year.