On Friday, Pimco's chief executive officer said that the firm is regaining client confidence after the improvement of slow trends.

After the departure of star manager Bill Gross last year, there were withdrawals of billions of dollars. However, the company has adapted and has left the turmoil behind.

At the Morningstar Investment Conference in Chicago, Pimco's Chief Executive, Douglas Hodge said that the uncertainty has diminished as 'trajectory of flows' has changed significantly over the last nine months.

Hodge said, "We recognize that the organizational changes that have taken place at Pimco over the last 18 months have created change and created uncertainty and anxiety. As we look at the last two or three months, we're starting to see the arrows come back up".

Pimco, of Newport Beach, California, remains one of the most influential fixed income managers with $1.7 trillion in assets under management.

However, assets are down from a peak of around $2.1 trillion two years ago after Gross announced that he would leave the firm.

After Gross had quit, Pimco's flagship Total Return Fund faced record redemptions. The withdrawals decreased in May to $2.7 billion, the lowest level since July 2014.

Among Pimco's 108 other mutual funds, outflows slowed to $1.9 billion in May, which are the smallest for any month since Gross left.

The fund - run by Scott Mather, Mark Kiesel and Mihir Worah - has returned 0.2% this year, outperforming 66% of similarly run funds. The fund has about $107 billion in total assets.