Google gained 0.7 percent to $1,131.12 at the start of trading on Tuesday. The world's largest online search engine announced late Monday a $3.2 billion deal to buy smart thermostat and smoke alarm maker Nest Labs Inc.
Nest will continue to operate as its own distinct brand after the all-cash deal closes, Google said on Monday.
The deal is the second largest in Google's history after the $12.5 billion acquisition of mobile phone maker Motorola in 2012.
Like the Motorola deal, which marked Google's first major foray into hardware, the Nest acquisition gives Google a stepping stone into an important new market at a time when consumer appliances and Internet services are increasingly merging.
Nest gained a large following with its first thermostat - a round, brushed-metal device with a convex glass screen that displays temperature and changes hue to match the colour of the wall it attaches to. It also tracks usage and employs that data to automatically set heating and cooling temperatures.
Presented by Adam Justice