A relative strength uptrend for electric and gas utility Southern Company (SO) appears to have come to an end. Between December and September, SO steadily climbed up the rankings of the SIA S&P 100 Index Report, rising from deep in the red zone up into the green zone. Yesterday it fell out of the green zone into the Yellow Neutral Zone for the first time since April after dropping 7 spots to 30th place. SO is down 23 positions in the last month.