UBS has today posted a 137% rise in fourth-quarter net profit, as high levels of client activity helped the world's largest wealth manager end 2020 on a strong note. 

Fourth-quarter net profit of $1.708 billion far outstripped expectations for $966m in a poll of 20 analysts compiled by the bank. 

"Our strong 2020 results clearly demonstrate the true strength of our franchise," the bank's chief executive Ralph Hamers said. 

Hamers, the former CEO of ING, took over from long-time UBS boss Sergio Ermotti in November. 

Strong lending and trading amongst its wealthy and ultra-wealthy clients, coupled with a surge in investment banking activity, helped Switzerland's biggest bank boost profits by 54% for the full year. 

It said its board intended to propose a dividend of $0.37 per share to shareholders, while the bank plans to buy back some $1.1 billion of shares this quarter. 

It will be launching a new three-year buyback programme of up to 4 billion Swiss francs, as well as wrapping up an existing one, as it adjusts shareholder returns to favour buybacks more strongly than in the past. 

UBS, the world's largest wealth manager, derives the biggest chunk of its profits from advising and managing money for the world's rich.

It also has smaller global investment banking and asset management operations. 

It conducts retail and corporate banking only in its home market. 

That business model paid off in 2020, as its low-risk lending book - comprised mainly of mortgages and loans to the wealthy, as well as a smaller portion of corporate and retail credits in its prosperous home market of Switzerland - suffered fewer losses than many high street peers. 

The bank ended the year with $694m in net loan loss expenses.

For the full year, every division besides its Swiss business saw pandemic-spurred gains. 

In the fourth quarter, wealth management saw profits rise 22% as growth in lending and continuously high transaction levels helped cushion the impact from falling and persistently low interest rates. 

The bank brought in $21.1 billion in fresh client inflows from wealthy customers, helping the division grow invested assets to $3 trillion. 

Investment banking, meanwhile, saw pre-tax profit jump to $529m from a loss in the fourth quarter of 2019, thanks to double-digit revenue growth in both its trading and advisory businesses, and as it pared back costs. 

Banks across the world have grappled with the uneven impact of the Covid-19 pandemic, as soaring stock markets boosted trading while national lockdowns had crippling economic consequences, leaving lenders braced for coming defaults. 

Earlier this month, Wall Street lenders focused on trading and investment banking posted blockbuster results, while consumer-oriented banks including Bank of America took a hit to business. 

In Switzerland, UBS' domestic business posted a surprise rise in fourth-quarter profit, as the bank cut provisions it had set aside for expected credit losses by 20 million francs.