Rio Tinto is trading 12.9% up at $105.78 after a strong first-half earnings report showed profits at a four-year high, driven by iron ore strength and higher production.

  • Underlying earnings jumped 43% to $6.9 billion, prompting investors to reprice the company's cash generation and commodity leverage.
  • The significant after-hours move comes despite broader equity market weakness, reflecting enthusiasm over the earnings beat.