Marquee U.S. technology companies such as Apple (NasdaqGS: AAPL), Amazon (NasdaqGS: AMZN) and Google (NasdaqGS: GOOG) have been boosting robotics investments. In just the second half of 2013, Google acquired eight robotics companies.

Amazon, Apple and Google are not members of ROBO’s 78-stock lineup.

Robo-Stox Global Robotics & Automation Index ETF

ETF Trends editorial team contributed to this post.