Japan's Nikkei slumps as AI leaders raise safety concerns; Topix gains
By Rocky SwiftJapan's Nikkei share gauge fell sharply on Monday, dragged down by technology shares after leaders of major AI companies called for a slowdown in development.The benchmark Nikkei 225 TVC:NI225 slid 1.61% to 62,979.17 in early trading. The broader Topix TSE:TOPIX gained 0.40% to 4,044…