(FILES) Former board member of the Swiss National Bank (SNB) and actual Deputy General Manager of the Bank for International Settlements (BIS) Andrea Maechler addresses a press conference in Bern on December 15, 2022. Doubts about the race for investments in artificial intelligence, inflation, high levels of debt The BIS, an institution often described as the central bank of central banks, is warning about several sources of vulnerability for the global economy that could collide and amplify each other. (Photo by Fabrice COFFRINI / AFP via Getty Images)