Shares of EVgo Inc. soared 18.1% in morning trading Tuesday, paring earlier gains of as much as 32.2%, after the electric-vehicle charging network announced expansions of its collaboration with General Motors Co. and its partnership with Uber Technologies Inc. . With GM, EVgo said the companies increased plans on building DC fast-charging stalls to 3,250 through 2025 from 2,750, and will increase the number of metropolitan markets covered to 52 from 40. "As EV adoption picks up momentum across both consumer and commercial segments, the charging infrastructure buildout needs to continue being a few steps ahead of demand,"...