The Securities and Exchange Commission said on Friday that it plans to hold a roundtable next month to discuss cybersecurity, after massive retailer breaches refocused the attention of the business community and policymakers on the area. The SEC said that it would hold the event on March 26 to talk about the challenges cyber threats pose for market participants and public companies. Recent breaches at Target Corp and Neiman Marcus have sparked concern from lawmakers and revived a long-running spat among retailers and banks over who should bear the cost of consumer losses and technology investments to improve security. The SEC in 2011 drafted informal staff-level guidance for public companies to use when considering whether to disclose cyber attacks and their impact on a companys financial condition.