Russia’s ruble headed for the best weekly gain against the dollar globally on demand from companies rushing to meet a tax deadline and as oil prices rebounded. The ruble is poised for a 4.5 percent advance for the week, the biggest rally among 170 currencies tracked by Bloomberg. Crude oil, the nation’s main export commodity was poised for the first gain in three weeks, paring the decline this month to 12 percent. The ruble’s strength “doesn’t look logical from the fundamental point of view,” Vladimir Vedeneev, chief investment officer at Raiffeisen Capital asset management in Moscow, said in e-mailed comments. “The move seems rather technical. Exporters have been selling the foreign-currency revenue.” Russian companies must pay about 1.3 trillion rubles ($22 billion) in taxes this month, with the largest portion falling due on March 25, according to a Bloomberg survey of five economists. They must pay the […]