<prompt> Human: So this question is not anything life changing. I already have 10k in my TSP after a few years in the military. Right now me and my wife are doing well she makes decent money and I get paid a little through the gi bill. Bills are fine we live a good life. I am just trying to figure out of there is a quick way over the next six months to a year I can set aside a few hundred in some kind of high interest return something and make it turn into a grand or so for some fun purchases. computer parts or a 4k tv if it cant be done its not that big a deal I will just wait until I have another influx of cash coming in and do it then Edit: I did doubt it could be done like that but on the off chance there was something and I just did not know I figure I would ask you guys  <response>: There is no guaranteed investment that will give you the interest rate you are looking for. Not even close.In order for, say, 300 to turn into 1,000 over the period of a year, it would have to pay 233 interest. Most 1-year investments that are completely safe return less than 1. 