Summary judgment was properly granted to defendant in this 10b-5 suit that came after a dramatic decline in Align’s stock price following an abrupt decrease in its sales growth in China. The abrupt decline in sale growth which came only three months after positive remarks by Align’s management and was unexplained by other external events was sufficient to give rise to an inference that the positive remarks were known to be false when made. However, six of the twelve positive remarks were non-actionable puffery expressing opinions not capable of objective verification. The remaining six remarks were positive, but concerned other aspects of the business in China, not its sales growth, and were not shown to be false.