Analysts say there's no evidence of a tech bubble
"Tech Analysts Rule Out a Dot-com Type Bubble" — Wall Street Journal's Daily Shot newsletter (subscription):
"Tech firms have been under pressure over the past couple days, with market losses spreading to Europe and Asia. ... Analysts, however, point out that there is no evidence of a tech bubble similar to what we saw in the late 1990s. Tech valuations do not seem to be too far off from the broader market."