The current collapse in crude prices is again fueling questions over the durability of the hard U.S. dollar currency peg used by Saudi Arabia. Despite the economic shock of the COVID-19 pandemic, the peg is likely to survive in the near term. But structural changes in both the global oil market and the Saudi economy means Riyadh will likely devalue its currency at some point in the next five years, as this time the kingdom will not be able to rely on a full recovery in prices for its oil exports to substantially replenish the large fiscal reserves that underpin its ability to defend currency pegs....