The August surprise moved bitcoin 8.2%. Today's scheduled one moved 0.63%

On 10 September the US Treasury names the size of its next buyback of long-dated bonds. The market looks for more than $4 billion and Morgan Stanley allows for $10 billion. At the upper figure, net supply of paper maturing beyond twenty years would fall by roughly 55%.

We have watched two Treasury buyback operations already, and the pair gives a calibration nobody else is publishing. The Treasury restarted these in 2024 after a two-decade gap, buying older off-the-run bonds back from dealers on a published schedule. That schedule is why the size, and not the fact of an operation happening, is the part anyone trades.

Two operations, two very different reactions

On 19 August the Treasury raised its buyback limit from $2 billion to at least $4 billion. Bitcoin went from about $65,400 to nearly $68,600 inside two hours, and we measured the move at 8.2% across twelve.

Today the scheduled operation landed as expected. Bitcoin opened at $78,456, reached $79,760 at 08:00 UTC and trades at $78,947 as this goes out. That is 0.63% on the day, with 1.66% at the high.

“The 19 August buyback expansion added 8.2% to bitcoin in twelve hours. The next operation is Wednesday, and the surprise has already been priced.”

— Intokened, 7 September 2026, intokened.com

Quote source: our own piece of 7 September 2026

On 7 September we wrote that the surprise had already been priced. The August jump was thirteen times today's close-to-close move. The prediction held, and the mechanism behind it is worth stating plainly: the market pays for the news of a bigger programme, not for the programme running on schedule.

Why the Treasury is buying at all

Yields are the reason the Treasury is doing this. The thirty-year reached 5.337% earlier, the highest since 2007. The Federal Reserve series puts it at 5.24% on 4 September, about ten basis points below that peak.

Buying back long paper takes supply out of the part of the curve where demand is thinnest. Less supply, lower yield, and the plumbing keeps working. Nothing in the operation mentions crypto.

We made that point in August: this is market plumbing, not policy. Bitcoin reacts because a fall in long yields loosens financial conditions, and loose conditions lift assets that pay no coupon.

What to watch tomorrow

Tomorrow's number is the one that matters, and the range is wide. Anything at or near $4 billion continues what the market has already absorbed. Ten billion would be a second surprise, and August is the guide to what a surprise is worth.

The 55% figure attached to the ten-billion case describes net supply beyond twenty years, not the whole market. It is a large number about a small corner of the curve, and reading it as a claim about Treasury issuance overall would be an error.

This piece is informational, not a recommendation to buy, sell, or hold any asset.