Why Future stocks are hitting lower circuit since Reliance Retail and Future Retail announcement?

My assumption is that given the sweet swap ratios for 5 stocks of Future group (FSC, FRETAIL, FLFL etc), people should buy these stocks so they straight away get a hefty premium when these stocks get merged with FEL. But I see the opposite happening and everyone seems to be offloading these stock in pre-market opening hours.

What am I missing here?