Aviva Rises, DFDS Surges, GB Group Sinks

Today's biggest winners and losers in the stock market.
On this episode of Stock Movers:
- Aviva shares rise slightly, briefly reaching their highest level since May 2018, after the insurer’s first-half operating profit exceeded estimates.
- DFDS shares rise as much as 21%, the steepest gain since 2008, after the shipping and logistics firm raised its revenue growth outlook for the year.
- GB Group shares fell as much as 27%, their steepest drop since 2009, after the identity verification and fraud prevention company lowered its full-year revenue guidance.

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