January 2018 NPD sales results - Nintendo Switch sold most the most units during the month overall

This comes from NPD analyst Mat Piscatella...

''Hardware spending in January 2018 grew 119 percent when compared to year ago, to $278 million. Spending gains were driven by Switch, Xbox One, and PlayStation 4 hardware sales growth. PlayStation 4, Switch, and Xbox One all performed well in the month of January. In dollar sales, the gap between the top-selling platform and the third best-selling was only 3 percent. Nintendo Switch was the month’s best-selling platform in Unit sales, while PlayStation 4 topped dollar sales. Xbox One dollar and unit sales in January 2018 are the highest achieved for the platform in a January month.''

from GoNintendo