I had a 401K with a previous employer. When I left, I rolled the account over to ShareBuilder and it's been sitting there ever since. I am not making any contributions to this account.
In the last year I've been contributing to the 401K through my current employer who has a plan setup through Fidelity. I do this to get the contribution matching.
Should I merge the two or should I leave them alone? Is there a disadvantage to having two? Are there any benefits?