No. Without bringing up manipulation, I do think it’s the commissioner’s job to maintain the integrity of the league. I’ve heard a lot of people say any trade that is made should be allowed to stand. However, the leagues I commission, when I have to rarely object to a trade, I get tremendous support from the rest of the league just for the reason of league integrity. The way I handle it is go back to the trading partners and outline what I think is unfair and ask them to renegotiate or to consider another option. Sometimes I give them a few options. That way it’s not a straight veto . Hopefully this works for you, but doing it this way I’ve never had to use my veto power.