Question 1

Why is the dollar the reserve currency?

Accepted Answer

Because after Bretton Woods the world agreed the dollar was the anchor, and when the anchor was cut loose in 1971 the rest of the architecture stayed. Oil is priced in dollars. Global trade is invoiced in dollars. Central banks park their savings in dollars because the U.S. Treasury market is the only bond market in the world deep enough to absorb trillions without complaining. A reserve currency is not a title someone hands out. It is an equilibrium that holds because every participant finds it more convenient to keep using it than to switch. The incumbency advantage is enormous. The dollar has had it for eighty years.

Question 2

What is the petrodollar?

Accepted Answer

In the 1970s Saudi Arabia agreed to price its oil in dollars, in exchange for U.S. security guarantees and the right to recycle its surplus into U.S. Treasuries. Every other major oil exporter followed. The effect is that anyone who wants to buy oil has to find dollars first, which means anyone who sells anything has a reason to want dollars, which means everyone holds some dollars. The arrangement has frayed at the edges in recent years. A few bilateral deals settle in other currencies. But the vast majority of global oil still trades against the dollar. Which is the petrodollar system, compactly.

Question 3

What would replace the dollar?

Accepted Answer

Not the euro, which has a bond market but also twenty different fiscal authorities who occasionally threaten to leave. Not the renminbi, which has size but also capital controls, an opaque legal system, and a central bank that answers to the party. Not a basket, not SDRs, not Bitcoin. The candidate does not yet exist. The reason the dollar is the reserve currency is that the alternatives are worse on the specific dimensions that matter: deep bond market, open capital account, enforceable contracts, a central bank that publishes its minutes. A replacement would have to beat the dollar on all four at once. Nothing is close.

Question 4

How does a strong dollar affect the US economy?

Accepted Answer

A strong dollar makes imports cheaper, which is good for the consumer and bad for the import price index inside CPI. It makes exports more expensive, which is bad for manufacturers and good for the trade deficit statistic, depending on how you count. It also tightens global financial conditions, because the rest of the world borrows in dollars and a stronger dollar makes those debts heavier in local-currency terms. The short answer is that a strong dollar is disinflationary at home and contractionary abroad. The Fed knows this and factors it into the policy call. The Treasury occasionally talks about it. Neither one wants to be the first to say what level of the dollar is actually correct.

Question 5

What is dollar milkshake theory?

Accepted Answer

A phrase coined by a fund manager named Brent Johnson, describing the idea that when global liquidity drains, the dollar sucks it all in like a milkshake through a straw. The logic goes: the rest of the world has borrowed in dollars, and when the cycle turns, they all need dollars at once to service those debts. Demand spikes, supply does not, the dollar rips higher, and everything priced in dollars gets cheaper in dollar terms. It is a memorable image. It is also a directional bet on a specific kind of global crisis, and it has worked about as often as bets on specific kinds of global crises usually work. Useful as a framing, not as a prediction.

The dollar, as the reserve currency.

Nominal Broad U.S. Dollar Index

The dollar, on your basket

The reserve currency, answered.

The dollar, as the reserve currency.

Nominal Broad U.S. Dollar Index

The dollar, on your basket

The reserve currency, answered.

Get the briefing in your inbox.