<h1>Market volatility, corporate disclosures and takeover bids raise securities-law, insider trading and market-manipulation risks under Rule 10b-5 and Reg FD</h1> Global equity markets traded mixed as investors awaited guidance from the US central bank on interest-rate policy, with modest moves across major European, Asian and US indices. Corporate announcements cited include a large strategic equity stake by one conglomerate in a US chipmaker, a US regulator's approval of a pharmaceutical treatment, and a cash acquisition offer for a hospitality group; such disclosures may trigger securities-law filing and disclosure obligations, potential market-manipulation or insider-trading scrutiny, and review under takeover rules. Market volatility around a high-profile central bank speech and upcoming economic data heightens legal and compliance risks for issuers, brokers and investment advisers.