While the world watches oil prices, an important cash buffer of the Fed has been depleted

The macro risks for Bitcoin at this moment are not really related to oil price volatility but are deeply embedded in the liquidity structure of the financial system. The Fed’s “passive buffer” liquidity layer is nearly exhausted — and this could quickly become a major obstacle to avoiding a deeper “crypto winter” for Bitcoin.

The liquidity cushion is almost gone

As of March 19, the size of the Fed’s overnight reverse repurchase agreement (ON RRP) program is only $0.637 billion — nearly zero. At the same time, the balance sheet report on March 18 shows:

Over the past two years, ON RRP has acted as a natural “pressure release valve”: funds can exit here to return to short-term bonds, repos, bank reserves, or risky assets. This helps ease pressure whenever the Treasury issues more debt or the market adjusts to tighter financial conditions.

Currently, this mechanism is almost ineffective. This means:

Bitcoin is increasingly dependent on macro liquidity

Recent market developments clearly reflect this change. Over the past week:

This indicates that Bitcoin is now trading closer to:

Structural shift: From “passive cushion” to “active management”

An important clarification: reverse repo has not disappeared entirely. The total reverse repo remains above $331 billion, but almost all of it is from foreign institutions. The “domestic cushion” — the factor the market cares about — is only about $698 million.

This marks a structural change:

In fact, the Fed has shifted its approach:

Interest rates and capital flows are now driving Bitcoin

In the March 18 meeting, the Fed kept interest rates steady at 3.50%–3.75% and emphasized:

Even a small change in yields can create pressure:

Given Bitcoin’s heavy dependence on ETF capital flows and risk appetite, these fluctuations have significant impacts.

The risk transmission mechanism has changed

Previously, when ON RRP still held hundreds of billions of dollars, shocks could be absorbed gradually. Now:

Fed research also shows:

Three main scenarios for Bitcoin

Neutral scenario:

Negative scenario:

Positive scenario:

What to watch next

Key indicators include:

Conclusion

The most important macro signal today is not oil prices but the near-complete disappearance of the passive liquidity cushion.

The big question is no longer whether a shock will occur — but when it does, whether the Fed can control its impact. If not, Bitcoin may have to absorb much of that pressure itself in an environment of increasingly tight liquidity.

Thach Sanh