From In re Oracle Corp. Secs. Litig., 2010 U.S. App. LEXIS 23531 (9th Cir. Nov. 16, 2010):

We are mindful of the shifting burden of proof governing motions for summary judgment under Federal Rule of Civil Procedure 56. The moving party initially bears the burden of proving the absence of a genuine issue of material fact. Celotex Corp. v. Catrett, 477 U.S. 317, 323, 106 S. Ct. 2548, 91 L. Ed. 2d 265 (1986). Where the non-moving party bears the burden of proof at trial, the moving party need only prove that there is an absence of evidence to support the non-moving party's case. Id. at 325. Where the moving party meets that burden, the burden then shifts to the non-moving party to designate specific facts demonstrating the existence of genuine issues for trial. Id. at 324. This burden is not a light one. The non-moving party must show more than the mere existence of a scintilla of evidence. Anderson v. Liberty Lobby, Inc., 477 U.S. 242, 252, 106 S. Ct. 2505, 91 L. Ed. 2d 202 (1986). The nonmoving party must do more than show there is some "metaphysical doubt" as to the material facts at issue. Matsushita Elec. Indus. Co., Ltd. v. Zenith Radio Corp., 475 U.S. 574, 586, 106 S. Ct. 1348, 89 L. Ed. 2d 538 (1986). In fact, the non-moving party must come forth with evidence from which a jury could reasonably render a verdict in the non-moving party's favor. Anderson, 477 U.S. at 252. In determining whether a jury could reasonably render a verdict in the non-moving party's favor, all justifiable inferences are to be drawn in its favor. Id. at 255.