How did PRTA's Q2 earnings surprise impact its stock?

Prothena's (PRTA) Q2 earnings report revealed a loss of $1.08 per share, which was a surprise to analysts who had expected a loss of only $1.02 per share. This resulted in an earnings surprise of -5.88%. The company's revenue for the quarter was $2.12 million, which missed the Zacks Consensus Estimate by 85.04%. This decline in earnings and revenue likely contributed to a negative sentiment around the stock.