Mumbai, July 5 -- Market regulator Sebi temporarily barred Jane Street Group from accessing the securities market for alleged index manipulation, dealing a severe hit to the US firm that made Rs.36,671 crore ($4.3 billion) in trading gains there in more than two years. Sebi said it would seize Rs.4,843 crore ($570 million) from Jane Street, which it claimed is the total amount of "unlawful gains" made by the firm, according to a 105-page interim order by Ananth Narayan, a board member at the regulator, on its website. Jane Street said it disputes the findings. P9...