Deutsche Bank fell to a wider-than-expected €1.6 billion loss in the fourth quarter, pushing its loss for 2019 to €5.7 billion on the back of restructuring costs. 

It was the third consecutive quarterly loss and fifth annual loss in a row for Germany's biggest bank. 

After calling off merger talks with rival Commerzbank last year, Deutsche embarked on a €7.4 billion restructuring plan involving 18,000 job cuts, the closure of some businesses and a management overhaul. 

"Our new strategy is gaining traction," said CEO Christian Sewing, who took over in 2018. 

Deutsche's results missed analysts' expectations for a €1 billion loss for the quarter and €5 billion for the full year.

The results conclude a turbulent decade for Deutsche, including a cumulative loss of €15 billion over the last five years and an 82% plunge in the shares over the decade.

For analysts and investors, Deutsche's ability to generate revenue has been a major concern. The bank has repeatedly trimmed its outlook. 

Revenue fell 4% in the fourth quarter to €5.3 billion and was down 8% for the year to €23.2 billion. The bank aims for annual revenue of €24.5 billion by 2022. 

Barclays said in a report ahead of the results that Deutsche's latest plan does not mark a turning point for the bank. 

"We think that the group will struggle to achieve the revenue aspirations presented in the recent strategy plan," it said. 

Revenue at Deutsche's cash-cow bond-trading division rose 31%, an improvement from recent declines but less than gains posted by some big US banks. 

"We're pleased with the momentum we've seen across the board in fixed income," Ram Nayak, Deutsche Bank's head of fixed income, told Reuters. 

"We've seen a nice uptick in our client volumes and a stabilisation of the franchise," he said. 

The bank has been seeking to cut costs, which investors are watching closely. 

It announced today that it had decided to halve 2019 bonuses for individual board members. It also told employees this week it would delay salary raises by a few months.

Deutsche Bank, now in its 150th year and considered one of the global financial system's most important banks, has also been hurt by a series of scandals. 

Seeking to repair relations with Berlin and the general public, last week it appointed to its supervisory board former German government minister Sigmar Gabriel, who once criticised the lender for a business model built on speculation.