Datadog falls 14% on outlook tied to one customer as Rapid7 jumps and Fastly slides
Datadog Inc., Rapid7 Inc. and Fastly Inc. all beat Wall Street’s third-quarter forecasts today, with Rapid7 the only one of the three to see its shares rise. A cautious outlook tied to one large customer knocked about 14% off Datadog’s stock in regular trading. Rapid7 jumped 18% after hours on…