What happened

Shares of PRA Group (NASDAQ:PRAA) plunged 16.7% in March, according to data fromĀ S&P Global Market Intelligence, after the debt-collection specialist released fourth-quarter results that showed a continuation of the company's aggressive, and expensive, plan for growth.

So what

After the markets closed on Feb. 28, PRA released mixed quarterly results, with revenue at $236.7 million up 12% year over year and earnings per share of $0.33, $0.07 per share ahead of consensus estimates. But the company's expenses climbed as it looked to grow its portfolio, with PRA in the quarter spending $490 million on finance receivables.

A man, seen from behind, places his hands on his head as he looks at images of declining stock charts.

Image source: Getty Images.

Soon after earnings, PRA re-emphasized that it was in growth mode by announcing the acquisition of Resurgent Holdings' Canadian business for an undisclosed sum.

The company also potentially spooked markets by disclosing that it belatedly realized it should have used different rules to account for certain contracts in Austria and as a result understated its total revenue by $5.5 million between 2016 and 2018. PRA said it doesn't anticipate any material changes but did briefly delay filing its 10-K year-end document.

Now what

PRA shareholders have had a turbulent ride over the past year-plus. Shares had been up 30% year to date before March 1, and even after the declines in the month they're still up 12% for the year. But that's following a 26% drop in 2018.

The business is growing, but investors are grappling over whether that growth will ever translate into sustainable profitability growth.