TBZ shares rally 16%, extending gains for a second session. What's triggering the surge?

TBZ shares jumped 16% after GRT Jewellers announced plans to acquire the jewellery retailer’s promoter stake and take control. The deal includes a Rs 249.61-per-share open offer for public shareholders. The stock has surged 38.4% in two sessions, trading well above both the open-offer and promoter-stake prices.