Why Are Capital Flows Changing?

Three Systems, One Equation

• Behind every financial cycle is a simple truth: the world must balance. What one sector spends, another must save. Governments, households, firms, and the rest of the world are tied together in a three-part equation that always adds to zero. But when capital stops flowing freely, because of tariffs, taxes, or tightening borders, someone pays the price.

• That’s what’s happening now. The US, EU, and China are all pulling in different directions. America is widening its deficit while threatening foreign capital. Europe wants to keep more of its savings at home. China is still running big trade surpluses, but the world is less willing to absorb them. The result? A rebalancing act with no clear absorber left.

America’s Contradiction

• The US is both the world’s biggest debtor and its largest magnet for capital. That model only works when foreign money keeps flowing in. But new policies, like taxes on financial transactions and “revenge taxes” on foreign investors, are scaring that capital away. Add in Trump-era tariffs and tightening trade routes, and the inflow risks drying up.

• At the same time, fiscal spending is ramping up. That leaves the private sector in a bind: save more to fill the gap, while also footing the bill for long-term investment, especially in AI. But with rates rising and liquidity tighter, the room to do both is shrinking. This mismatch is no longer theoretical, it’s starting to squeeze markets.

US Financial Balance, % of GDP

The AI Bottleneck

• The AI boom is capital intensive. It needs data centres, chip factories, power grids, and secure infrastructure. But all of that takes money, and lots of it. With public budgets stretched and foreign capital less reliable, the burden falls on domestic savings.

• Households and firms now face a double burden: save more to stabilise the economy and invest more to build the future. Something will have to give, either consumption, investment, or stability itself. And if the AI-driven productivity story falters, valuations could come under pressure fast.

Europe’s Realignment

• The EU is changing its playbook. Strategic autonomy is no longer just talk. More defence spending, new green industrial policies, and a push to deepen internal capital markets through a Savings and Investment Union all point to one thing: Europe wants to rely less on the US and more on itself.

• That reduces the flow of European capital into US assets, increases pressure on the dollar, and raises the risk of FX volatility. Global rebalancing, once managed through open flows and mutual absorption, is now becoming a zero-sum game.

Euro area Financial Balance, % of GDP

China’s Dilemma

• China still runs a current account surplus and channels savings through state-led investment. But if the rest of the world stops absorbing those surpluses, either through trade or capital, Beijing will be forced to shift. That means boosting domestic consumption, something it’s been reluctant to do.

• Without that pivot, China’s excess savings will keep pushing into overcapacity, suppressing global returns and fuelling friction with other economies. There’s no easy fix, only a slow grind toward internal rebalancing.

China Financial Balance, % of GDP

No Absorber of Last Resort

• The financial balance’s identity always holds, but now it’s holding under strain. The US can’t keep borrowing without foreign inflows. China can’t keep exporting without foreign demand. And Europe can’t stay neutral forever.

• That means higher real interest rates, tighter liquidity, and more pressure on the private sector. It also means slower investment, just when the world needs it most.

How We’re Thinking About It at Cordoba

• The days of easy capital and smooth global flows are fading. Expect greater divergence between markets, more volatility, and stronger pricing of local risks.

• In equities, companies with clean balance sheets, local funding channels, and capex-light growth models will hold up better. Bond markets face a supply glut and weaker demand. Treasuries may no longer be the go-to safe haven. FX markets, meanwhile, are entering a more turbulent phase, with the dollar facing structural headwinds from all sides.

• It’s not that capital is disappearing. It’s that it has fewer safe places to go.