BN Briefing: Canada's Carney at Davos; Zuma’s Russia letter row, Heystek's Joburg property punt

In today's BizNews Briefing, Mark Carney's Davos message to “middle powers”: the old rules-based order is fracturing, and countries like South Africa need strategic autonomy without retreating into fortresses. Locally, a reported letter linked to former President Jacob Zuma raises fresh questions about South Africans recruited for “training” in Russia and ending up near the Ukraine front line. We also hear Iraj Abedian’s warning on Iran’s unrest — and Magnus Heystek’s contrarian take: Cape Town looks bubbly, Johannesburg offers value.