PIMCO is paying $20 million to Securities and Exchange Commission to settle charges that it misled investors in the firm’s Total Return ETF.

The fund had been managed by bond king and PIMCO founder Bill Gross, who left the $1.5 trillion firm in 2014. Gross was not listed in the SEC’s order and did not immediately respond to requests to comment.

In February 2012 PIMCO launched the Total Return ETF, and its assets quickly grew from $102 million to over $1.7 billion in a four-month period due to investor interest, according to the SEC’s order. To bolster its early performance, the fund purchased small-size bonds — known as “odd lots” — at a discount but used higher “round lot” pricing provided by a third-party vendor to inflate returns, according to the charges.