A moral trade occurs when individuals with different values cooperate to produce an outcome that’s better according to both their values than what they could have achieved individually.
Source: Effective Altruism Global (video).
Effective Altruism is a social movement dedicated to finding ways to do the most good possible, whether through charitable donations, career choices, or volunteer projects. EA Global conferences are gatherings for EAs to meet. You can also listen to this talk along with its accompanying video on YouTube.