Bitcoin rose as much as 7.7% on Monday to touch $87,354, its highest price since late January. That is more than $10,000 above where it traded a week ago.
The money followed. US spot Bitcoin ETFs took in $999 million on the same day, meaning far more money went into the funds than came out. It was their third straight day of net inflows. Ether funds added $270 million and Solana funds took in $26.1 million.
Six days before that, Bitcoin was sitting near $76,000. Here is what moved it.
Oil fell, and that helped everything risky
Brent crude dropped for a fourth straight session to around $102 a barrel, down from roughly $108 in mid-September.
Cheaper oil matters because fuel costs feed into the price of almost everything. When oil falls, investors start to believe inflation will cool off.
That belief moved money into US government bonds, which pushed the 10-year Treasury yield down to 4.93%. The yield is the interest the US government pays to borrow, and it sets the benchmark for safe returns everywhere else. Above 5% earlier in September, investors could sit in something safe and still earn well. Back under 5%, riskier assets look more appealing.
Bitcoin pays no interest at all, so it gains directly from that shift. Stocks did too. The Nasdaq 100 rose 2% to clear 30,000, led by chip companies, and the S&P 500 gained as well.
Then bearish traders got forced out
About $648 million in short positions were closed out as Bitcoin climbed.
A short position is a bet that a price will fall. If the price rises instead, those traders have to buy the asset back to close the bet and limit their losses. That buying pushes the price higher still, which forces more of them to do the same.
This is called a short squeeze, and it explains why Monday's move was so sharp. One thing to understand about it: a squeeze burns through positions once and then it is finished. It creates a fast move, not ongoing demand.
Bitcoin also closed last week above its average price for the past 50 weeks, something it had not managed in 45 weeks. Traders watch that line for signs the longer trend is turning.
The ETF money arrived alongside the rally
The timing here is the detail most coverage skips.
For the week ending September 19, US spot Bitcoin ETFs took in just $6.21 million on net, after losing about $746 million on September 15 and 16. Large investors were staying out.
Then Monday brought $999 million in one session. BlackRock's IBIT took $381 million and ARKB added $289 million. Bitcoin and Ether ETFs together drew about $1.27 billion. Total holdings across US spot Bitcoin ETFs now sit near $110 billion, roughly 6.3% of Bitcoin's entire market value.
So the fund money did not start this rally. Oil, bond yields, and the short squeeze did, and the ETF inflows showed up the same day. Whether those inflows continue this week is the clearest sign of whether steady demand is building underneath the price.
Companies were buying as well. Strategy added 950 BTC for $75.7 million, and Strive Asset Management bought 1,355 BTC for $107.7 million.
Bitcoin took some hits first
The week before all this was rough. The Federal Reserve raised interest rates for the first time since 2023, the Bank of Japan raised rates to a 31-year high, and the Senate blocked the CLARITY Act, a bill that would have set federal rules for how digital assets are classified. Bitcoin fell below $76,000 during that stretch without dropping much further.
Then on September 17, two days after the CLARITY vote failed, the SEC granted a five-year Innovation Exemption allowing approved venues to run on-chain trading of tokenized US stocks. Congress stalled, but the regulator moved on its own. Bitcoin finished the third quarter up 44%.
What to watch this week
- Whether ETF inflows stay near Monday's level or drop back toward zero
- Thursday's meeting between President Trump and President Xi on trade, tariffs, and chip policy, which is currently lifting appetite for risk across all markets
- The Fear and Greed Index, a market sentiment gauge, at 71 out of 100 and up 15 points in a week, which shows confidence rising quickly
- Oil prices, since most of this move traces back to them
Bitcoin is back at levels it last held in January, and still around a third below its October 2025 record near $126,300. Two of the three drivers behind this rally can keep running. The short squeeze has already done its work.
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