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Illya Gerasymchuk
Entrepreneur / Engineer

US Treasury yields & curve analysis

Ongoing commentary on the yield curve, auction results, duration risk and what Treasuries signal about macro conditions.

User Illya Gerasymchuk -

2025-08-13 00:00

a bank may buy a US Treasury bond (UST) and hold it as an asset. at some point, that bond matures, thus terminating its existence

User

most of financial institution's assets have an expiration date

these assets are mostly composed of loans, debt securities and money market instruments

still, all come with an expiration date

User Illya Gerasymchuk -

2025-08-11 23:00

i also wrote a thread explaining the importance of USD-denominated government debt for short-term funding/credit markets

remember that most of credit is issued to refinance existing debt and not for new financing

you can read it here:
https://illya.sh/threads/@1751726431-1

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User

i wrote about how reverse repurchase agreements work and their importance in the global financial system in this thread:
https://illya.sh/threads/@1751561045-2

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User Illya Gerasymchuk -

2025-08-02 17:39

legally mortgage backed securities are bonds since they are tradable debt securities

but they're not a plain bond, due to the option of borrower's early repayment

Macaulay or modified duration used for Treasuries doesn't work - you need effective/option-adjusted duration

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User

the duration formula for MBS assumes for some pre-payments

if those happen at a smaller rate - the duration increases

User Illya Gerasymchuk -

2025-07-28 21:42

🇷🇺 Russian 3Y bond yield is down ≈20% over the last 3 months 😳

of course - this isn't a surprise to you if you've been following my posts. i wrote extensively about this

the biggest reason behind the sharp drop today is the recent 200bp key interest rate cut down to 18%

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User

not all bonds are the same 🇺🇸🇯🇵🇪🇺🇷🇺

while US, EU & Japan yields are soaring 📈

Russian bond yields are falling 📉

🇷🇺 10Y bond yield down 8% since March

just like i wrote more than 3 months ago

check my posts for a detailed expiation & what's coming next

👇

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User Illya Gerasymchuk -

2025-07-15 16:09

🇺🇸😳 30Y US bond yield above 5%

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User

WOW

US 10 Year bond yields are up 2.24% today

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User Illya Gerasymchuk -

2025-07-14 13:12

not all bonds are the same 🇺🇸🇯🇵🇪🇺🇷🇺

while US, EU & Japan yields are soaring 📈

Russian bond yields are falling 📉

🇷🇺 10Y bond yield down 8% since March

just like i wrote more than 3 months ago

check my posts for a detailed expiation & what's coming next

👇

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User

Ruble is a gold success story ✨

Sanctions, tariffs, raising M2 - it doesn't care

Central Bank Of Russia sold off their US bonds & loaded up on gold

⬇️ US bond prices are down
⬆️ Gold is up
⬆️ Ruble is up against USD

Expect this playbook to be repeated by others

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User Illya Gerasymchuk -

2025-07-07 18:23

shorter-term US bonds yields react IMMEDIATELY to repo funding rate

notice the huge green candle on June 30th - the same day of FED's SRF $11B volume

June 30th is when the FED SRF volume recorded ≈$11B

this is a 1 month treasury bill ⬇️

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User

persistently high(er) funding repo rates will push the treasury yields up

eventually, the bonds would be sold for cash

again - think of the timescale: funding rates refer to much shorter periods

User Illya Gerasymchuk -

2025-07-07 18:20

persistently high(er) funding repo rates will push the treasury yields up

eventually, the bonds would be sold for cash

again - think of the timescale: funding rates refer to much shorter periods

User

repo funding rates don't affect US treasury yields immediately due to time scale

treasury bond yield expectation is over 10 years, and repo rates are a short-term debt funding mechanism

so the rates shock would need to be prolonged/pronounced to affect treasury rates

User Illya Gerasymchuk -

2025-07-07 18:19

repo funding rates don't affect US treasury yields immediately due to time scale

treasury bond yield expectation is over 10 years, and repo rates are a short-term debt funding mechanism

so the rates shock would need to be prolonged/pronounced to affect treasury rates

User

funding rates on repo markets & bond yields are not the same

different timescales:
1️⃣ repo - short-term / ≈day(s),week(s)
2️⃣ treasury bonds - ≈10 years

so even if a funding rate raises for a few days, the longer-term bond yields may not be affected

User Illya Gerasymchuk -

2025-07-07 18:17

funding rates on repo markets & bond yields are not the same

different timescales:
1️⃣ repo - short-term / ≈day(s),week(s)
2️⃣ treasury bonds - ≈10 years

so even if a funding rate raises for a few days, the longer-term bond yields may not be affected

User

note that FED's SFR doesn't lower the treasury yields per se

it's more correct to say that it puts downward pressure on them, in the form of a $500B buffer

& note that treasuries probably wouldn't be the first in line for liquidation

User Illya Gerasymchuk -

2025-07-07 18:16

note that FED's SFR doesn't lower the treasury yields per se

it's more correct to say that it puts downward pressure on them, in the form of a $500B buffer

& note that treasuries probably wouldn't be the first in line for liquidation

User

how does SRF lower UST bond yields?

if you have a US bond and you need cash, your options are:

1️⃣ borrow cash against bond in repo markets
2️⃣ sell the bond

this $500B liquidity pool for US bonds prevents their sell-off in the open market, which would raise their yields

User Illya Gerasymchuk -

2025-07-07 18:15

how does SRF lower UST bond yields?

if you have a US bond and you need cash, your options are:

1️⃣ borrow cash against bond in repo markets
2️⃣ sell the bond

this $500B liquidity pool for US bonds prevents their sell-off in the open market, which would raise their yields

User

with SRF the FED sets an upper limit on repo market rates

most of the collateral is US Treasury bonds

this exerts downward pressure on bond yields - by preventing sell-offs

User Illya Gerasymchuk -

2025-07-07 17:56

with SRF the FED sets an upper limit on repo market rates

most of the collateral is US Treasury bonds

this exerts downward pressure on bond yields - by preventing sell-offs

User

SRF provides daily $500B liquidity limit for overnight repo operations

a rate is published daily & dealers lend borrow against US bonds

dealers/market makers use SRF when the rate in the open repo market gets too high

SRF = Standing Repo Facility

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User Illya Gerasymchuk -

2025-07-05 18:12

once FED lowers interest rates, it's likely to put downward pressure on yields - assuming term premia doesn't increase by more

in the end, the yields will be higher than in the last 20 years, for the same FED funds rate

QE/liquidity injections will further devalue USD

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liquidity abundance leads to the narrowing of spread between riskier and safe assets (mostly government bonds)

safe assets fall in price, with their yields increasing towards the riskier ones

US bond yields are high under tighter monetary conditions - liquidity is pro cyclical

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User Illya Gerasymchuk -

2025-07-05 18:06

liquidity abundance leads to the narrowing of spread between riskier and safe assets (mostly government bonds)

safe assets fall in price, with their yields increasing towards the riskier ones

US bond yields are high under tighter monetary conditions - liquidity is pro cyclical

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User

the higher use of lower quality collateral has pro-cyclical effects

if the price of collateral falls during economic downturn - you'll get a lot of margin calls & insolvencies. this will further put pressure on short-term funding mechanisms, which already lack HQ collateral

User Illya Gerasymchuk -

2025-07-05 15:40

US Treasuries are by far the most popular collateral type in secured short-term funding markets (e.g. the repo market)

outstanding volume of these markets is larger than M2

notice the increase in usage of less safe assets as a collateral

not enough UST for its demand ⬇️

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User Illya Gerasymchuk -

2025-07-03 17:44

in the end, you get your UST bond back

and it makes sense for you to repurchase the bond (collateral) even if the price falls

as long as the price fall is < ≈haircut (2% in our case)

User

so if you have a UST bond worth $100:

lender applies a haircut (e.g. 2%) - 100*(1-0.02)=$98
lender sets a repurchase price (e.g. $98.013)

so you use your $100 bond to get a $98 loan, for which you must repay with a fee (interest) $98.013

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User Illya Gerasymchuk -

2025-06-18 01:21

everybody has been so focused on oil price, that they largely ignored the decrease in US bond yields across the curve

this trend has been consistent throughout the month

interpretation 🧠:

short-term sign of run to safety, specially when combined with gold price

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User Illya Gerasymchuk -

2025-06-13 16:39

Interestingly, the yields on US bonds are up across the yield curve - for both, short & long-term maturities

The market - understandably - associated gold, rather than government debt with safety

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User Illya Gerasymchuk -

2025-05-29 02:38

🇺🇸 Cancelled tariffs means refunds, which means a larger budget deficit

Rising bond yields means that deficit is (even) more expensive to refinance

The FED will soon need inject liquidity via QE + lower interest rates

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User Illya Gerasymchuk -

2025-05-25 20:51

⚡️ US Bond yields directly affect USD liquidity

Here's how 👇

1️⃣ Repo + reverse repo market provides $5 trillion of liquidity
2️⃣ US bonds represent ≈70% of collateral
3️⃣ Lower bond prices means smaller loans, leading to a liquidity squeeze

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User Illya Gerasymchuk -

2025-05-22 12:44

🤯 The year is 2002…

US bond yields are at the same high levels as they were in 2002… That's 23 years ago

In 2002 US national debt was x6 SMALLER than now

5.1% now is not the same as 5.1% before - it's worse. Much more debt to refinance & pay interest

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User Illya Gerasymchuk -

2025-05-21 22:14

Who's ready for a new gold ATH? 🙋

You don't have to guess - just look at the systemic raising bond yields across all maturities & multiple sovereigns

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