Investors are increasingly betting on stagflation as the Gulf war pushes oil prices higher, creating a dangerous mix of persistent inflation and economic stagnation. Barclays strategist Emmanuel Cau notes markets now price a sustained 'higher for longer' oil backdrop, reinforcing stagflation concerns. This shift is evident as global stock indices, particularly energy importers in Asia and Europe, tumbled sharply recently, signaling growth worries overtaking inflation fears. Stagflation now dominates investor portfolios, forcing central banks into a difficult balancing act between growth and inflation.

However, inflation remains the immediate focus, with swaps markets showing bets on tighter US, European, and UK monetary policy. The upcoming US PMI data on Tuesday is critical, potentially validating the Fed's cautious rate-cut stance amid rising fuel costs. Oil prices are key, as any sign of price pressure could cement the Fed's reluctance to ease policy further, despite signs of economic weakness. Traders have pivoted away from expecting rate cuts, with some now pricing potential hikes to curb inflation.

The UK faces similar pressures, with the BoE acknowledging stagflation damage and economists forecasting inflation peaking near 4% later this year. Gfk's March confidence index is expected to drop sharply, reflecting rising uncertainty and cost pressures. Investors will watch these data points closely, especially the US PMI, to gauge vulnerability in the world's largest economy and potential currency volatility from diverging policy paths.