Synopsys (SNPS) stock is down 35.8% in a day. The sell-off comes as the semiconductor design software vendor posted quarterly results that missed analysts’ expectations, while also lowering its full-year outlook as demand for its design intellectual property fell. This is a concern for investors, as IP has been viewed as a high-margin, recurring revenue stream for the company.CHONGQING, CHINA - MAY 25: In this photo illustration, the logo of Synopsys is displayed on a smartphone screen, with the company's p ...