Telefónica S.A.

Telefónica, based in Madrid, is one of Europe's largest telecom operators, running mobile and fixed networks in Spain, Germany, the UK and Brazil under brands such as Movistar and O2. Essential connectivity gives it steady revenue, but heavy debt and tough competition have long weighed on its finances. Telefónica was for years a high-yield income stock, but it has cut its dividend more than once, at times paying partly in new shares, to protect its balance sheet. A high but historically unreliable yield defines its profile, with the payout dependent on cutting debt and stabilising its main markets.