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Dollar Index Gains to Extend on Rate Support, SocGen Says
Societe Generale sees real-rate differentials providing sustained support for the US dollar, challenging the bearish consensus. The next move hinges on upcoming CPI data and Fed minutes.
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Societe Generale expects the US Dollar Index to extend its gains, with interest-rate differentials remaining the primary engine behind the greenback’s appreciation. The call lands as global central banks follow sharply different scripts: the Federal Reserve is holding rates at restrictive levels, while the European Central Bank and Bank of Japan face economic conditions that constrain their ability to close the rate gap.
The Simple Read: Higher Nominal Rates, Stronger Dollar
Many traders see a clean transmission mechanism. The United States offers the highest nominal yields among G10 currencies, attracting carry-seeking flows into the dollar. The DXY’s inverse relationship with EUR/USD–the pair accounts for more than half of the index–suggests that a wider US-Eurozone rate spread weakens the euro and lifts the dollar. This logic has driven the greenback for months and underlies the Societe Generale call.
The Better Read: Real Yields, the Euro Anchor, and the Yen Carry
Nominal rates tell only part of the story, however. Real yields, which subtract inflation expectations, drive currency performance more powerfully. US real rates have climbed as consumer price pressures stay sticky while expectations remain anchored, widening the real policy gap versus the eurozone. The ECB began cutting rates in 2024, and the Bank of Japan has moved only incrementally, leaving the US with a significant real-rate advantage. That advantage makes dollar-denominated assets more attractive.
Because the DXY is heavily weighted towards the euro, the index turns into a de facto bet on the single currency. Any further widening of real-rate differentials directly pressures EUR/USD and lifts the dollar index. The Japanese yen, the second-largest component, reinforces the dynamic. The Bank of Japan’s cautious tightening keeps the US-Japan rate spread extremely wide, encouraging yen-funded carry trades that weaken the yen and boost the dollar index. Societe Generale’s view likely incorporates both the European and Japanese rate gaps.