The SEC's antifraud Rule 10b-5 prohibits trading on the basis of inside information of a business corporation's stock by Securities Law & Liabilities of CPA's The SEC's antifraud Rule 10b-5 prohibits trading on the basis of inside information of a business corporation's stock by Anyone who bases his or her trading activities on the inside information. Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+