Clicking Andrey Vihrov name brings us to his User Profile but its reputation is no longer -143. Is it a bug?
The users page shows the reputation amount weekly, monthly, quarterly, yearly and totally. -143 is for the current week only, the user has 2959 at the moment.
Note, he has put 300 reputation for a bounty this week, which explains the loss. Besides that bounty investment he gained reputation.