Firmus - the tech company part-owned by Oliver Curtis, who served prison time for insider trading - has signed a  multibillion-dollar deal with OpenAI to build two data centres in Malaysia as part of a multi-year partnership. Plus, the trial of three men accused of killing Australian brothers Callum and Jake Robinson gets under way in Mexico, and an iconic Sydney mansion is rumoured to be back on the market.

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OpenAI signs multibillion-dollar deal with Oliver Curtis’ Firmus, fuelling record float

We want to find out why’: Aussie surfers’ parents face suspected killers as Mexico trial begins

Sydney’s iconic Boomerang mansion back on the market with a $100m price tag