Today's biggest winners and losers in the stock market.

On this episode of Stock Movers:

• Raspberry Pi rises 23%, to its highest in two months, after first-half revenue at the micro-computer maker jumped 90% to $256.9 million. Adjusted Ebitda more than doubled and the company expects full-year Ebitda above market consensus. Shares are up 150% this year.
• H&M shares fall as much as 3.7%, the most since July, after US tariff refunds were largely credited for driving a beat in third-quarter profits at the Swedish fast-fashion retailer. JPMorgan said margins fell significantly once the refunds are accounted for, while RBC analysts noted high inventory due to supply chain disruption.
•  Vistry shares drop as much as 10% after the housebuilder reported weak interim results and outlined the findings from the review conducted by its CEO.