As Vernier's team was capturing pollutants, Lau and his colleagues tracked down the sources by feeding years of satellite measurements of pollution and meteorological conditions — taken as
frequent as every few hours — into a new computer program developed by NASA called MERRA2.
One possibility, he said, is that
frequent traders laboring under the «illusion of control» believe that they can respond easily to information and events during the day but can't do so
as easily after
hours, when there are far
fewer market participants and less money, or «liquidity,» involved in trading.