sdceller,
Yes, I have worked the system this way. I HELOC’d 10K (locked the rate at 6.5%) and put the money in a 12 month CD at 5.1%. I’m probably not coming out ahead interest wise, but for me it is the only way I can save money. I’m really good about making monthly payments, but I’m not good at saving. Also, at the time I had hoped that CD rates would keep going up, but they seem to have stalled around 5%.