Connexus Credit Union, open nationwide and easy to join, is offering a rare trio of deals that can boost what you earn on your cash. That means banks and credit unions will likely reduce the rates they pay on savings, money market, and CD accounts in the coming months. Our roundup of the best high-yield checking accounts includes accounts paying up to 6%. Here's what it takes to qualify:Meet the 5% APY requirements for two statement cycles within your first four months. For savers who want to put more than $5,000 in a CD, Connexus delivers the top nationwide rate.