On February 27, 2013, the Supreme Court issued its much-anticipated decision in Amgen, Inc. v. Connecticut Retirement Plans & Funds, 568 U.S. __ (2013), addressing central questions concerning class certification in federal securities fraud actions that the Court last examined two terms ago in Erica P. John Fund, Inc. v. Halliburton Co., 563 U.S. ___ (2011). Like Halliburton before it, Amgen further clarifies the burdens that a plaintiff seeking class certification must carry. Because certification of a plaintiff class magnifies stakes of a securities fraud action -- and thus can create enormous pressure on defendants to settle -- the Amgen ruling is of critical importance to public companies and their directors and officers, insurance carriers and outside professionals.