SAN

Former J.P. Morgan strategist Marko Kolanovic warned that the high-flying South Korean stock market, including Banco Santander's significant exposure to Samsung and SK Hynix, could crash. Such a warning can lead to a sell-off in shares of companies with high South Korean market exposure.

Banco Santander, along with other lenders like Barclays and Wells Fargo, is exposed to the collapse of the UK mortgage finance firm Market Financial Solutions. This exposure can lead to concerns about the bank's financial health and potential losses.