They are always on the minds of investors. "Whether we're talking about socks or stocks, I like buying quality merchandise when it is marked down," Warren Buffett, a celebrated investor, once joked. Most share prices have fallen this year—the s&p 500 index of American stocks has shed more than a fifth of its value—but the prices of technology stocks have plunged most precipitously. The tech-heavy nasdaq is down by almost a third, after poor third-quarter earnings precipitated yet another sell-off. Amazon, Netflix and Meta have this year shed a whopping 48%, 58% and 70% of their value. Such discounts mean tech stocks are certainly on sale. But are they a good deal?