Fed's $6.6T Problem: The Next Chair's Key Test

As the market awaits President Donald Trump's pick for the next Federal Reserve chair, a critical question looms beyond interest rates: how will the new leader manage the central bank's colossal $6.6 trillion balance sheet?

While Trump has consistently pressured current Chair Jerome Powell for deep rate cuts, the next nominee's stance on the Fed's asset holdings is just as crucial. The core debate is whether to continue buying Treasury bills to maintain liquidity or resume shrinking the balance sheet to pull cash out of the financial system.

This decision directly impacts the core funding markets that the world's largest financial institutions rely on for daily operations.

The Case for a Smaller Fed Balance Sheet

Former Fed Governor Kevin Warsh, widely seen as a frontrunner for the position, has been a vocal critic of the Fed's current strategy. His position represents a significant potential shift in policy.

"One key differentiator for Warsh is that he strongly favors a smaller Fed balance sheet," noted Wells Fargo strategist Angelo Manolatos. "However, this goal is especially complicated to achieve as the Fed ended balance-sheet runoff in December and is now expanding the size of its balance sheet."

For over a year, Warsh has argued that years of aggressive bond-buying have gone too far, risking the Fed’s entanglement in "the messy political business of fiscal policy." His criticism dates back over 15 years; while he supported initial bond-buying after the 2008 crisis, he later warned that further purchases could fuel inflation and distort market signals.

Warsh believes that by keeping interest rates artificially low for so long, the Fed has enabled massive US government debt accumulation and fostered a "monetary dominance," where markets become dangerously dependent on central bank support.

A More Cautious Approach from Other Contenders

Other potential candidates for the job hold more moderate views on the balance sheet.

• Rick Rieder: The BlackRock executive has argued the Fed should stop shrinking its holdings to prevent destabilizing critical funding markets.

• Christopher Waller: A current Fed governor, Waller initially supported a smaller balance sheet last year but changed his view after strains emerged in money markets.

• Kevin Hassett: The National Economic Council Director's commentary has focused more on interest rates than the Fed's asset portfolio.

Online betting markets recently showed increased odds of Warsh securing the nomination after President Trump expressed reluctance about nominating Hassett.

A Look Back: When Tightening Roiled Markets

The next chair will inherit money markets that have proven highly sensitive to changes in Fed policy. The events of 2019 serve as a stark reminder of the risks.

That year, the Fed had to intervene to calm severe strains in short-term funding markets. Volatility surged again late last year, sending repurchase agreement rates soaring and driving up demand for the Fed's repo operations. The turbulence was caused by a combination of increased government borrowing and the Fed's "quantitative tightening"—the process of unwinding its holdings, which effectively drained cash from the system.

In response, the Fed quickly pivoted. It began adding reserves back into the system, buying about $40 billion in bills each month to relieve the pressure. The market instability at the end of 2025 further highlighted the sharp disagreement over how much the Fed can shrink its assets without causing a crisis.

"What's the primary tool?" asked Priya Misra, a portfolio manager at JPMorgan Investment Management. "Is it still the fed funds rate, with the balance sheet as the secondary tool? It's still an existential question. Can a new Fed chair come in and convince everyone to change their view?"

Navigating White House Pressure and Market Risks

Whoever succeeds Powell will face intense political pressure. A hawkish stance on the balance sheet, like Warsh's, could directly conflict with the White House's agenda.

"The administration is pushing for lower rates one way or the other, so neither hawkish rate views nor balance-sheet views would be welcome in that regard," said Gennadiy Goldberg, head of US rates strategy at TD Securities. He added that while a chair like Warsh might have strong instincts, "balance-sheet policy is also decided by committee, just like interest rates."

The next leader will be caught in a difficult position. The White House is demanding steeper rate cuts, while bond markets are becoming more sensitive to fiscal risks and tight liquidity.

"This topic is going to come up," Misra said. "The bond vigilantes have woken up, and the political side has woken up that the fiscal side is pretty important. If we're going to see fiscal easing and bond vigilantes pushing back at the same time, the Fed will be stuck in the middle."