From Longman Business Dictionary
headlinehead·line /ˈhedlaɪn/ adjectiveadj1headline figure/rate British EnglishBrEECONOMICS in Britain, a figure that shows the general level of inflation, including MORTGAGE payments (=repayments on a loan for buying a house)The headline rate of inflation is being pushed towards 4% by higher mortgage costs.
→ compare underlying 2headline trading/investmentFINANCE when a person or company trades or invests on the basis of information they get from the news