The financial frontline of Russia’s war in Ukraine runs through the offices of overworked sanctions officers at banks everywhere. It is their job to freeze the accounts and assets of sanctioned oligarchs. The pressure is colossal: get it wrong or act too slow, and the impact on a bank’s brand and bottom line will be felt for years to come.

The war in Ukraine has further highlighted the benefits of Banco Santander’s diversification across Europe and the Americas, according to executive chairman Ana Botín. However, its European home market may be a big disadvantage in Citi’s looming auction of Mexican lender Banamex.

ESG has been an intense focus for banks in recent years – not least for their communications teams. But with war in Ukraine, ESG has hit its first real test – and the talking has stopped.

Margin hikes are raising the table stakes in markets from commodities to stock loans. Margins may be a better risk signal than curiously subdued measures like the ViX index of equity volatility.

The Russia-Ukraine war is a sobering reminder for all treasurers that geopolitical risk can escalate rapidly. The importance of forward planning cannot be overstated.

War in Europe changes everything. In the medium term, European countries will spend heavily on new sources of energy, their military and perhaps on food security. In the short run, comes slower growth. The financial markets are barely capable of pricing these hits. They have no capacity at all to price further unprovoked attacks on countries beyond Ukraine, much less a full-on war with Nato or nuclear conflict.

When a group of leading banks were unable to source the roubles needed to deliver in settlement of FX swaps, compression trades saved the day. The episode serves to highlight how fragile very large, complex and interconnected financial markets have become.

What practical steps do banks have to take when a client falls foul of a sanction list?

Western governments need to wise up to how smart Putin and his people are at hiding and moving their money.

Despite the current financial turmoil, proponents of de-dollarization still have a mountain to climb. But blockchain and digital currencies could put their goal within eventual reach.

Where do the borders of ESG lie – now and in the future? Investors from the US to China are revisiting these questions and finding thorny and often unpalatable answers, even as they dump Russian assets for ethical reasons. The results are set to shape the financial world’s relationship with sustainability for years to come.

The early days of war in Ukraine saw the price of bitcoin rise. New technology now improves the prospect that wealth stored in crypto may be spent.