y Halliburton, 134 S. Ct. 2398, 189 L. Ed. 2d 339; accord In re Titanium Dioxide Antitrust Litig., 284 F.R.D. 328, 336 (D. Md. 2012) r .91] ; In re Mills Corp. Sec. Litig., 257 F.R.D. 101, 104 (E.D. Va. 2009); In re Safety- Kleen Corp. Bondholders Litig., No. 3:00-1145-17, 2004 U.S. Dist. LEXIS 31099, 2004 WL 3