Asked this earlier on another thread, sorry to double post! I'm in HSA Bank, and am currently sitting on close to $5k in my account. I'm trying to figure out when to start investing, and how much... I've seen different numbers thrown around - some sources say you need to keep a minimum of $1k in your account, others say as much as $5k - or else you pay a penalty. The FAQ on their website is no help. Does anyone know?