Weakness in both stocks weighed on the broader indices after-hours. The Powershares QQQ ETF is off nearly 1 percent and S&P futures are weakening.
Google reported second-quarter adjusted earnings of $9.56 a share versus Wall Street estimates of $10.78 a share. Revenue of $14.11 billion missed forecasts for $14.41 billion.
Average cost-per-click, which measures how much an advertiser pays when users click on ads, fell 6 percent from the year-ago quarter, after falling 4 percent in the first quarter.
Paid clicks, which measures how often users click on Google ads, rose about 23 percent over the second quarter of last year, but were up only 4 percent sequentially.
In the year-earlier quarter, Google earned $10.12 a share on revenue of $9.61 billion.