DUBAI—Saudi Arabia surprised investors Tuesday with the abrupt sale of $11 billion in bonds, roiling its rival Qatar’s plans to raise debt and fueling concerns that a diplomatic standoff was bleeding into the financial world.
Bankers on the deal said the Saudi bond sale came without the normal dayslong sales pitch to investors across multiple Western financial capitals—known as a roadshow. It came a day after Qatar began its own roadshow for its first bond sale in nearly two years, the bankers said, and could sap interest...