The global coffee supply balance is seen shifting from a deficit in the 2019-20 season to a surplus in 2020-21 as expected changes in people’s behavior related to social distancing is seen hurting demand, commodity broker Marex Spectron said on Wednesday. Marex expects the global balance to shift from a projected deficit of 4.3 million 60-kg bags in the current season to a surplus of 2 million bags in the 2020-21 season (October-September).