Central Bank Signals Matter—But These Forces Tell Us More

Federal Reserve Chairman Kevin Warsh speaks during a news conference after raising the federal-funds rate for the first time in three years on Sept.16. (Saul Loeb / AFP via Getty Images)

The Federal Reserve’s decision last week to raise the federal-funds rate for the first time in three years brought a mixture of relief and uncertainty to financial markets. How many more rate increases might be coming, and when? As is often the case, investors focused on a few key words, in this case the Fed repeatedly signaling a “timelier” return to its 2% inflation objective.

Focusing on this one meeting or a handful of words, however, risks overlooking what will shape economic paths and interest rates in the long term: balance sheets.

A balance sheet of the world’s assets, liabilities, and wealth, assembled by the McKinsey Global Institute, offers insight. It totaled $1,800 trillion in 2025, up about $100 trillion from 2024, and has steadily outpaced global gross domestic product growth this century. Global household wealth has also reached an unprecedented level at $570 trillion.

In short, the world has never been richer.

But much of that wealth didn’t come from productive investment—from capital going into new factories, infrastructure, and technologies, for example. Instead, rising valuations are increasingly detached from the underlying economy. In other words, much of the wealth is merely on paper.

Debt and leverage also rose. For every $1 of net new investment last year, the world added $2.50 of debt. Wealth increased by nearly $5.

In this world of balance-sheet inflation, central banks have a far more complicated task than if just consumer-price inflation was running hot. Asset markets become increasingly sensitive to interest rates to maintain valuations, governments carry larger debt burdens, and financial stability concerns begin to compete directly with central banks’ inflation objectives.

The world’s major economies may eventually be forced to reconcile their elevated balance sheets with their underlying fundamentals. They have a few potential paths ahead: productivity acceleration to grow into the balance sheet, sustained inflation, or a painful, full-scale balance-sheet reset where valuations collapse. There’s another undesirable path—secular stagnation of the kind Europe and the U.S. experienced during the 2010s, in which balance sheets stay elevated while growth and interest rates fall to near-zero.

These scenarios bring interest rates back into focus.

Productivity acceleration typically leads to higher interest rates, given heightened demand for capital and heightened opportunity costs. Sustained inflation may do the same, though with more damaging implications for an economy as central banks raise rates to tame price pressures. Balance sheet resets typically mean large-scale monetary stimulus (think post-2008-09 financial crisis). Secular stagnation points to rock-bottom interest rates but also weak growth and heightened risk.

The U.S. appears to be on the productivity acceleration pathway more so than its peers. Investments in artificial intelligence and technology are booming and expected to only grow; U.S. equity markets have rewarded those expectations, pushing valuations to historic highs of roughly 3.7 times GDP. However, public debt and deficits are also soaring, creating upside risks to inflation.

Regardless of whether increased productivity or inflation wins out in the long term, the U.S. economy will face higher rates. Elevated asset prices, meanwhile, will make the economy all the more sensitive to a deterioration in corporate earnings or investor confidence triggered by rate hikes, which may then precipitate a balance-sheet reset.

Europe faces a different problem altogether. On the surface, its balance sheet appears healthier than America’s: Household leverage has moderated, real estate valuations have cooled, financial excesses are less pronounced, and public debt in most countries is lower and rising less than the U.S.

But Europe is on a path of secular stagnation. Weak productivity, subdued investment, and persistently high savings are weighing on growth. Europe’s central bank may be able to get away with lower interest rates—they are currently 1.5 percentage points lower than the Fed’s—but for less-than-ideal reasons.

The world’s other major economy, China, has another set of structural challenges to rightsize as it works through a partial balance sheet reset. Rather than battling excessive inflation, Chinese monetary policymakers are attempting to manage deflationary forces in the aftermath of a years-long correction in the country’s property market, while simultaneously trying to create growth by supporting private and public spending.

The result has been rising public and corporate debt, which is now at 80 cents on every dollar of corporate assets. To heal its oversize balance sheet, China will need to foster stronger domestic consumption and put its existing capital to better use. Neither will be easy, and both are out of the hands of monetary policymakers.

The world’s three largest economies are confronting fundamentally different trajectories driven by deep structural imbalances. The U.S. is under-saving, Europe is underinvesting, and China is under-consuming. None of them will be right-sized at their central banks’ next meetings.

What the Fed and its counterparts do and say at this moment is important, no doubt. But we risk missing the forest by looking at the trees.

Guest commentaries like this one are written by authors outside the Barron’s newsroom. They reflect the perspective and opinions of the authors. Submit feedback and commentary pitches to ideas@barrons.com.

Shubham Singhal is a senior partner at McKinsey and chair of the McKinsey Global Institute. Jan Mischke is a partner and Rebecca J. Anderson is a senior fellow at the Institute.

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