The S&P 500 and the Nasdaq on Friday closed at an all-time high, capping a week that had produced a decided uptrend as investors parsed a round of corporate results, economic data and the spread of COVID-19. All three benchmarks, however finished the week solidly higher. The S&P 500 gained just under 6 points, 0.2%, to close near 3,380, a record. The Nasdaq Composite closed about 18 points, 0.2%, also at a record, 9,729. Meanwhile, the Dow Jones Industrial Average closed TK down. On the day, investors weighed slightly sluggish retail sales growth in January against relatively upbeat corporate earnings, even as companies like Expedia warned on the impact of the viral outbreak that reportedly originated in Wuhan, China last year. For the week, the Dow gained 1%, the S&P 500 was up 1.6%, and the Nasdaq gained 2.2%.Market Pulse Stories are Rapid-fire, short news bursts on stocks and markets as they move. Visit MarketWatch.com for more information on this news.