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Rio Tinto's opportunistic $US4bn approach for stretched lithium play Arcadium signals Jakob Stausholm's mining giant has got its mergers and acquisitions mojo back again, writes Eric Johnston.

Meanwhile, Kearney Asia Pacific chair Shigeru Sekinada has toured Australia, looking to build bridges between Japanese corporate giants and local business.

And TPG Telecom is targeting apartment owners with its cheap and fast broadband offering – some 10 times faster than the NBN – that is achieved by ‘hot-rodding up’ old copper wire.