MADRID (Reuters) -Spanish airport operator AENA said on Wednesday its 2021 loss narrowed by half as passenger traffic through its terminals recovered some ground from the 2020 slump though it forecast 2022 traffic to remain well below pre-pandemic levels. The group cut its net loss to 60 million euros ($68.02 million) from 126.8 million euros a year earlier, while total revenue climbed 6.7% to 2.39 billion euros. AENA shares traded 2% down, while the blue-chip index was 0.8% up. Passenger traffic in AENA’s terminals rebounded by nearly 60% last year from a near standstill in 2020 when COVID-19…