If I put $10 into a 401(k) and lose $0.0001 of it because the fund manager didn't bother to protect me from fast middlemen, because it doesn't benefit him at all, am I still entitled to complain?
Sure, but you should complain to the crappy fund manager you hired to do a good job for you not the person who the fund manager was competing against.
You also might want to switch to Vanguard. They do a good job and realize that HFTers have dramatically lowered costs for them and their clients: http://www.cnbc.com/id/49434073
You also might want to switch to Vanguard. They do a good job and realize that HFTers have dramatically lowered costs for them and their clients: http://www.cnbc.com/id/49434073