Oil falls 40%. For a pegged oil exporter, trace the effect on the budget, the currency, interest rates and the yield curve, then position a foreign bond portfolio.

The deficit jumps from 1% to about 7% of GDP, the current account swings from a 3% surplus to a 8.2% deficit, and defending the peg forces rate hikes that invert the curve. Reserves drain as dollars stop arriving, so the central bank raises short rates, while long rates rise less because the squeeze points to recession. For the fund: cut local currency bonds, because the extra yield does not pay for a devaluation risk above about 23% a year, and keep dollar exposure short-dated.

Picture a household where one earner brings in most of the money and that earner's pay is cut by 40%. The monthly budget breaks, savings start to run down, and the family borrows. Qamaria gets hit through two channels at once: the budget, because oil pays for most of the state, and the external account, because oil brings in most of the dollars. Chain the shares. Oil revenue is 60% of revenue that is 25% of GDP, so 15% of GDP; losing 40% of it widens the deficit by 6 points to 7%. Oil exports are 70% of exports worth 40% of GDP, so 28% of GDP; losing 40% removes 11.2 points and turns the current account from +3% to -8.2%.

A currency pegA promise by the central bank to hold the exchange rate at a fixed level, which it keeps by buying and selling its reserves. holds only while the central bank can sell dollars to anyone who wants them. With the current account in deficit, fewer dollars arrive; at 8.2% of GDP a year, reserves of 22.5% of GDP last about 2.7 years even before capital runs for the door. To keep money at home the central bank raises short rates sharply, while long rates rise less because investors expect the squeeze to cause a recession and later cuts. The result is a curve where three-month money yields 11.0% and ten-year bonds 8.4%, an inversion of 260 basis points.

Compare the carry with the cliff. A one-year local bond at 10.4% beats a 4% dollar deposit by about 6.4 points if the peg holds. If the peg breaks, a 25% devaluation is a plausible first step. The local bond breaks even with dollars only if the chance of devaluation within the year is below about 23%. With twin deficits of 7% and 8.2% of GDP and a clock on the reserves, that is not a probability to be confident about.

Say what would change the view: a credible spending cut, external financing that rebuilds reserves, or oil recovering. A pegged exporter can hold the line for a while, but the cost of holding it is a recession, and that is what the inverted curve is saying. The limit of this sketch is that it treats every share as fixed; in practice imports fall too, which slows the reserve drain and buys time.