Hong Kong Exchanges and Clearing Limited (HKEX) has made a surprise takeover bid for London Stock Exchange Group (LSE), taking its boldest step yet to expand into a global financial marketplace from its current status as China’s offshore fundraising hub.HKEX made an indicative offer to pay £83.61 per LSE share in cash and stock for the London bourse operator, valuing it at £29.6 billion (US$36.6 billion), according to a filing after Hong Kong’s market hours.“A combination of HKEX and LSE…