The playbook is to sell rallies in risk and maintain volatility hedges".Prices current at around 2:40pm AEDTLive updates on the major ASX indices:The ASX 200 has climbed off the mat but is still looking a bit wobbly on its pins.At 2:30pm AEDT it had had almost halved its losses to be down 0.8% having slumped by as much as 1.5% early in the session.When US President Donald Trump posted "Cuba is next" on Friday this blog didn't for a moment think he was referring to the communist enclave off the coast of Florida as being the recipient of White House largesse and a shipload of Russian oil.But there you go; Russian oil appears to be no longer under US sanctions, and Cuba no longer appears to be being starved of oil after the US takeover of Venezuelan production.Here's how Reuters is reporting the perplexing volte-face.US President Donald Trump signalled he was reversing course on blocking oil shipments to Cuba, saying he had "no problem" with any country sending in crude as a Russian tanker neared a Cuban port with a badly needed shipment.A sanctioned Russian vessel, part of the country's "shadow fleet," was just off the coast of eastern Cuba on Sunday, according to ship tracking data, and was expected to reach port on Monday, a lifeline for the country's economy that has nearly ground to a halt under a de facto oil blockade imposed by Washington.The US cut off Venezuelan oil exports to Cuba after toppling Venezuelan President Nicolas Maduro on January 3, and Trump threatened to slap punishing tariffs on any other country that sent crude to Cuba shores after dealing with Iran.OIL CARGO COULD SHORE UP CUBA FOR A MONTHEarlier in March, the U.S