PMorgan has issued a wave of downgrades in the airline space, but American Airlines Group Inc. AAL was the lone upgrade in the firm’s latest report. Analyst Jamie Baker said airline investors turned their attention to rising costs in the third-quarter earnings season. “Costs matter after all, capacity is rising, United’s turnaround appears grounded, and investor patience is wearing thin despite RASM guides that mostly emerged at the better end of expectations,” Baker said. Read moreSeems like a little downside is over. Stochastics are oversold, so the price can get back inside the rising channel. $AAL, American Airlines Group, Inc. / D