Federated Investors' "Month in Cash" features "Sovereign-debt jitters drive up yields," which says, "Interest rates moved in opposite directions in May as U.S. government yields dropped and dollar Libor yields rose in response to mounting jitters over sovereign debt issues within the 16-country euro zone. The unusual bifurcation in yields reflects the first significant reappearance of credit-related uncertainty since the world financial system began to stabilize in the spring of 2009. Within the government sector, one-month Treasury yields dropped two basis points to 0.16% while one-year Treasury bill yields plunged 11 basis points to 0.31%. Meanwhile, one-month Libor rose from 0.28% to 0.35%, three-month Libor spiked from 0.35% to 0.54%, six-month Libor climbed from 0.53% to 0.75%, and one-year Libor jumped from 1.01% to 1.20%. By comparison, three-month Libor (the rate often cited as the benchmark for interbank funding stresses) peaked at 5.75% during the 2008-'09 financial crisis."