[4] After Hall took charge of Phibro’s energy unit in 1991, the company shifted away from moving physical cargoes and into trading paper derivatives.
As the head of a then subsidiary of Citigroup, Hall's compensation drew criticism about Wall Street pay in the aftermath of subprime-related bank bailouts.
[5] Citigroup sold Phibro to Los Angeles based Occidental Capital for $370 million, in part due to the pay controversy.
[10] The Hall Art Foundation operates two museum spaces in Derneburg, near Hannover, Germany[11] and in Reading, Vermont.
[12] The Hall Art Foundation also has an exhibition partnership with the Massachusetts Museum of Contemporary Art, in North Adams, Massachusetts[13] and collaborates with other public institutions around the world to organise exhibitions and facilitate loans from its own collection and that of the Halls.