In a reversal of historical norms, emerging market policymakers have been more disciplined with monetary and fiscal policy. This has led to lower average inflation in EM countries, creating attractive opportunities with real yields that are significantly higher than in developed markets.

The stability of emerging market risk assets hinges on the U.S. Federal Reserve's contained reaction to oil price shocks. By not aggressively tightening policy, the Fed avoids exacerbating the shock for EM economies. This "asymmetric reaction function" allows other central banks to maintain a slower, less growth-restrictive policy response.

The Federal Reserve's decision to keep rates unchanged provides a crucial, if unintentional, benefit to Emerging Markets. It limits pressure on EM central banks that would otherwise be forced to hike rates to defend weakening currencies against a backdrop of rising global interest rates, giving them more time to assess the shock.

Despite a major geopolitical shock, Emerging Market currencies have held up remarkably well. In contrast, EM rates markets have shown significant stress, indicating painful positioning squeezes and a reassessment of inflation risks by investors. This divergence signals underlying strength in some areas but reveals hidden fragilities in others.

The market believes the Fed is more likely to ease on weak data than tighten on strong data. This perceived asymmetry in its reaction function effectively cuts off the 'negative tail risk' for global growth, making high-yielding emerging market carry trades a particularly favorable strategy in the current environment.

While a stronger growth environment supports EM currencies, it is problematic for low-yielding EM government bonds. Their valuations were based on aggressive local central bank easing cycles which now have less scope to continue, especially with a potentially shallower Fed cutting cycle, making them vulnerable to a correction.

Emerging markets have become less reactive to US economic data, like non-farm payrolls, breaking historical patterns. Investors believe the Federal Reserve has an "asymmetric" reaction function, meaning it's unlikely to adopt a hawkish stance even with strong data. This assumption dampens the traditional ripple effect of US economic news on EM assets.

Even if US inflation remains stubbornly high, the US dollar's potential to appreciate is capped by the Federal Reserve's asymmetric reaction function. The Fed is operating under a risk management framework where it is more inclined to ease on economic weakness than to react hawkishly to firm inflation, limiting terminal rate repricing.

A significant shift is occurring where EM central banks, like in South Africa and Korea, are turning hawkish pre-emptively to combat inflation. This is happening even without the typical trigger of currency depreciation, indicating a proactive policy response to the inflation-growth mix rather than a reactive move to provide risk premia for a weakening currency.