Swore in June 24th

On June 24th i (26m) swore in and by July 22nd had my TS interview, i didnt lie and was truthful... as of last week roughly (1 month and a half later) my investigation closed... is it weird for the investigation to have finished so fast? If so is it a good sign? This is my first time ever going through the process, for context i scored a 90 kn my asvab