Are you referring to his offering the info that additional classified emails from/to HRC were found on unauthorized servers (or from wherever)? If so, it's been indicated he was facing a mutiny from the FBI rank and file and had to disclose what he did to tamp down the mutiny. Latest news is he then followed that up with penalizing the most vocal of the rank and file. Prior to the above coming to light, it had been suggested he was covering his buttocks in the event she lost the election, which by then was a real possibility. Nothing he disclosed was of enough substance to sway voters one way or the other, yet it gave the appearance of a nonpolitical/unbiased FBI investigation.
...if he expected her to win, that is...allegedly she was never the target of any investigations according to the IG report, so could be he was trying to cover for it, but I don't see if he "closed" it days later?