China buys US bonds

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China buys US bonds발음듣기

In order to maintain a trade imbalance we know that the Chinese central government needs to keep its currency artificially weak.발음듣기

And to do that they essentially can print their currency and use that to buy US dollars.발음듣기

So what they do is they increase the supply of yuan and they increase the demand for dollars, keeping their currency weak.발음듣기

Now, the next question you might ask is what do they do with the actual dollars that they bought with the yuan that they printed.발음듣기

Well, they don't want to just sit on those dollars.발음듣기

They'd prefer to be collecting some type of interest on that money.발음듣기

So instead of just keeping it all in some warehouse someplace they actually just lend that money to the US government.발음듣기

And they lend that money by buying US Treasury bonds, by buying T-bills and T-notes.발음듣기

So that money that they use that they bought with their printed yuan, that goes to the US Treasury.발음듣기

And the US Treasury gives the Chinese Central Bank treasury bonds.발음듣기

So these are treasury bonds.발음듣기

Now, what's the effect of this?발음듣기

Clearly, the Bank of China is getting interest on its money now.발음듣기

It's helping to finance the US government's debt.발음듣기

But maybe even more interestingly, it is creating incremental demand for T-bonds, for treasury bonds.발음듣기

Now, what does that do?발음듣기

Well, if you're increasing the demand for anything that's also going to increase the price.발음듣기

So the price of treasury bonds, of T-bills and T-notes, goes up.발음듣기

T-bills are durations less than one year.발음듣기

Notes are durations more than a year.발음듣기

So the price goes up.발음듣기

But what happens if the price goes up?발음듣기

That means that the interest that the government has to pay on this debt goes down.발음듣기

And I explained that in more depth in other videos.발음듣기

Now, the interest goes down.발음듣기

That means that the cost of borrowing for the US government goes down.발음듣기

But that's also the benchmark rate for the cost of debt in general.발음듣기

So in general it finances US debt, both of the government and really just credit more broadly.발음듣기

So debt becomes cheaper inside of the United States.발음듣기

This is Salman Kahn from the Khan Academy for CNBC.발음듣기

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