If you want to take advantage of high interest rates to boost your savings, it can be worth looking into alternatives to a savings account. Two options are certificates of deposit (CDs) and Treasury bills, both of which can offer competitive interest earnings — as high as 4% or more, in some cases. But which option is the best? When weighing CDs vs. Treasury bills, here's what you need to know to decide. What are Treasury bills, and how do they work? Lately, interest in Treasury securities has skyrock ...