The Financial Post reports in its Saturday edition that U.S. President Donald Trump's botched "Liberation Day" in April had both stocks and bonds skidding. The Globe's Barbara Shecter writes that falling bond prices pushed yields upward on both 10-year and 30-year securities, a sign that investors saw more risk over the longer term in the country whose bonds and currency underpin much of the global financial system. The safest market in the world suddenly started to look like Argentina and Nigeria. The tremors caused Mr. Trump to back down on the worst of his tariff onslaught, but not before raising serious questions about how long the U.S. government can continue to service its swelling $37-trillion (U.S.) wall of debt and whether it could precipitate the next global financial crisis. "The bond markets around the world are very tightly integrated now, more so than in past decades," said economist Derek Holt at Bank of Nova Scotia. "One country's bond yields getting shocked can change the appetite for many other different countries." Contagion becomes more of a concern as countries around the world face common drivers that are leading to more borrowing, from trade reverberations to budget challenges, Mr. Holt added.