shares of generac holdings inc gnrc powered up 93 toward an eightmonth high in afternoon trading tuesday which was enough to pace the sp 500’s spx gainers the home power generator maker’s stock was getting a boost after chief executive officer aaron jagdfeld told bloomberg that the company has seen a dramatic increase in sales in the texas region as a heat wave has raised concerns over the stability of the state’s power grid the stock which was on track to close at the highest price since oct 18 2022 has run up 147 amid a threeday win streak it has rocketed 595 since it closed at 8979 on dec 22 2022 which is the lowest close since april 7 2020 the stock has soared 315 month to date which puts it on track for the best monthly performance since it ran up 337 in february 2021 meanwhile the sp 500 has tacked on 47 in june