"The REA Board believes that there are clear similarities between REA and Rightmove in terms of their leading market positions in the core residential business, continued expansion and innovation of offerings across adjacent segments, leading audience share and strong brand awareness, as well as highly aligned cultural values," the company said in a statement to the London Stock Exchange. REA, an Australian company, didn't say what it would pay for the acquisition. Rightmove's market cap reached $7.1 billion on Tuesday after shares in the company jumped 20 percent on the news.