As the Wagner convoy rumbled northwards towards Moscow on Saturday, markets braced for turmoil. What would armed uprising in Russia do to the supply and price of oil, gas, wheat or fertiliser? Would it provoke investor flights to gold or bitcoin? But when the episode fizzled out, Monday’s prices saw little more than upticks, with natural gas traders more preoccupied by outages in Norway and FTSE action refocused on dim domestic economic prospects.