The euro traded in positive territory on Thursday after the European Central Bank left interest rates unchanged, delivering the widely expected pause while keeping investors focused on whether another increase could follow as soon as September.

The decision brought no immediate shock to currency markets. Instead, the euros next direction now depends on how strongly ECB President Christine Lagarde warns about the inflationary threat from surging energy prices during her press conference.

The Price

The euro traded around $1.14 against the US dollar following the announcement, holding close to a one-week high after showing only a limited initial reaction to the decision.

That muted movement reflected how thoroughly the pause had already been priced into the market. Traders had placed only a small probability on another immediate increase after the ECB raised borrowing costs by 25 basis points at its previous meeting in June.

ECB keeps rates unchanged

The European Central Bank maintained the deposit facility rate at 2.25%, the main refinancing rate at 2.40% and the marginal lending facility rate at 2.65%.

The decision temporarily interrupts the renewed tightening cycle that began in June, when policymakers raised rates for the first time after a prolonged period of monetary easing.

Yet this pause should not be mistaken for the end of the ECBs inflation fight.

The central bank continues to face an uncomfortable combination of weakening economic momentum and renewed price pressures, leaving policymakers with little room for a decisive commitment in either direction.

Oil has transformed the debate

The most important change since the ECBs previous meeting has not come from wages, consumer demand or domestic economic activity. It has come from the energy market.

Oil prices have surged toward $100 a barrel as the renewed conflict in the Middle East threatens shipments through some of the worlds most important maritime routes.

That creates a dangerous dilemma for the ECB. Higher energy costs can push headline inflation upward and spread through transport, manufacturing and food prices, but raising interest rates again could place additional pressure on an already fragile European economy.

The ECB is therefore attempting to buy time without appearing complacent.

Why the euro did not jump

An unchanged rate decision offered little reason for traders to chase the euro higher immediately. The outcome was almost entirely expected, meaning the currency market is now searching for signals about what comes next.

The crucial question is whether the ECB sees the recent energy shock as temporaryor as the beginning of a more persistent inflation problem.

A strongly hawkish message from Lagarde could encourage traders to increase expectations of a September rate increase, offering fresh support to the euro.

A more cautious tone, particularly one focused on slowing growth and weak demand, could suggest that the ECB remains reluctant to tighten policy again and leave the single currency vulnerable to renewed pressure.

September becomes the real decision

Todays announcement may ultimately prove to be a pause between two rate increases rather than the beginning of a prolonged hold.

Eurozone inflation slowed to 2.8% in June but remains above the ECBs 2% target, while the latest surge in oil prices threatens to reverse some of that progress over the coming months.

Financial markets are therefore increasingly treating the September meeting as the next genuine decision point. By then, policymakers will have more evidence about whether expensive energy is feeding into broader prices, wages and inflation expectations.

The central banks challenge is that waiting carries risks, but acting too quickly may deepen Europes economic slowdown.

Euro outlook

The euros immediate direction now rests less on the rates that were announced and more on the language used to explain them.

If Lagarde leaves the door clearly open to a September increase, EUR/USD could extend its recovery and attempt to move beyond its recent highs.

If she pushes back against aggressive market expectations and stresses the weakness of the European economy, the euro could surrender its early gains and retreat below the $1.14 area.

The ECB has paused, but the battle over European interest rates is far from over. For the euro, the most important announcement may not be todays decisionit may be the warning hidden inside Lagardes next sentence.