Democrat blue wave sweeps Congress – what now for markets?

What the midterm results mean for markets

Democrats took control of both the Senate and the House on Tuesday, winning in places where the party had long since stopped expecting to – Kansas now has its first Democratic senator since the Great Depression and Texas has elected a Democrat statewide for the first time since 1994 – and in doing so delivered an outcome that few had predicted at the start of the year. By election day, prediction markets had priced it heavily, which may explain why the initial panic proved so short-lived.

US stock futures fell as much as 2% overnight as the AI trade took the first hit, with SoftBank plunging 10% and Kioxia down as much as 15% in Tokyo, before dip-buyers stepped in and futures edged back into positive territory by the European morning. Europe's STOXX 600 gained 0.5%, banks climbed more than 2% and Russell 2000 futures rose 0.7% after losing 1% earlier. Markets, it seems, have decided they can live with this.

The bull case: gridlock has its admirers

The standard market reading of divided government is that it creates a blockade against new legislation, and with Democrats well short of the two-thirds supermajority needed to override a presidential veto, the next two years look likely to involve plenty of hearings and very little lawmaking. Markets have traditionally welcomed that sort of stalemate. There is also a specific fiscal relief for bond markets – Trump's promise of a $5000 payment to adult citizens, a pledge worth $1.2 trillion or 16% of the federal budget, disappeared along with Republican control of Congress.

Clean energy, battered for two years, led the gains. Orsted gained 7%, Vestas 5% and Nordex 4.7%, while China's SSE Star 50 surged 10% on gains for local chipmakers.

The bear case: AI faces a less friendly Washington

The less comfortable reading centres on the AI trade, which has carried global markets for much of the past few years and which now faces a Congress whose voters have shown in polls that they favour tighter control of the technology. Few analysts expect legislation capable of derailing the data-centre buildout, but investigations into the sector look likely, and the change of governor in both Texas and Georgia may matter more than it first appears – the two states account for roughly a third of all AI data-centre spending and projects, according to Moomoo ANZ's Tapas Strickland.

Tesla and SpaceX took the heaviest punishment, falling 4.5% to 5% on Europe's Tradegate platform against declines of 0.3% to 0.9% for other Big Tech names. Crypto suffered too, with bitcoin dropping as much as 2.79% to $75,666 after Sherrod Brown won Ohio's special Senate election despite $30 million spent against him by the crypto super PAC Fairshake. A strong forecast from AMD provided a timely cushion for chip stocks, for the time being at least.

Bonds, the dollar and gold in focus

Treasuries emerged as the clearest winner, with the 10-year yield falling around 3bps to 4.92% after touching 4.89% overnight and the 2-year easing to 4.60%, as investors priced in slower government spending and the possibility that AI regulation cools growth enough to reduce the need for Fed rate hikes. Money markets duly trimmed expectations for hikes next year.

Lower yields dragged the dollar index to a one-month low around 101.4, leaving the euro at $1.1236 and sterling at a seven-week high of $1.3475, while the Swiss franc led the safe-haven bid with the dollar down 0.54% at 0.8162 francs. Gold jumped more than 2%. Oil remains hostage to the Iran war, with Brent trading choppily around $103–104 a barrel.

What could signal a turning point

Several developments may determine whether the blue wave becomes a lasting market theme:

• The first congressional hearings on AI and data centres, which could set the tone for tech sentiment into 2027.
• Calls in the outstanding Senate races in Mississippi and Alaska, which will settle the size of the Democratic majority.
• Any renewed US strikes on Iran, which could lift oil prices and support the dollar.

If AI scrutiny stays at the level of hearings and headlines, the early sell-off may prove a buying opportunity for the chip names; if it hardens into data-centre restrictions in the states that host them, the trade that has powered markets for years could lose momentum. A blue wave for bonds, but a red flag for AI?