The cumulative losses of domestic airlines are likely to come down by two-third at $550-$700 million in FY20 against the earlier projected number of $1.7 billion on account of improvement in fares and prices of jet fuel stabilising at around the current levels, the Centre for Asia Pacific Aviation (CAPA) said in its latest forecast released on Tuesday. It added that strong balance sheets are key for long-term viability and the Indian aviation industry is likely to see new investors in 2-3 Indian carriers in 2019-20.