Monday 12 October: $81,842.3 (-2.29%)
Tuesday 13 October: $83,156.8 (+1.61%)
Wednesday 14 October: $81,657.0 (-1.80%)
Thursday 15 October: $82,227.5 (+0.70%)
Friday 16 October: $81,587.4 (-0.78%)
Saturday 17 October: $81,477.7 (-0.13%)
Sunday 18 October: $82,111.0 (+0.78%)
Monday 19 October: $81,923.9 (-0.23%)
Tuesday 20 October: $83,012.4 (+1.33%)
Wednesday 21 October: approx. $83.5K (provisional)
US spot BTC ETF flows (Farside, cross-checked against SoSoValue-based reports)
Top 5 BTC ETFs by BTC held (BitcoinTreasuries.net, 21 Oct)
Top BTC Treasury Companies
Software updates
Bitcoin Supply and Holdings
What it means
BTC closed at $83,012.4 on Oct 20, which is a 0.89% drop from the $83,758.7 close on Oct 11.
The biggest daily drop was on Oct 12, by -2.29%, with no specific news related to BTC.
BTC dropped on Oct 14, with the release of CPI showing 3.7% inflation.
Spot BTC ETFs saw -$228.4M from Oct 12-16, then +$549.9M from Oct 19-20 (net +$321.5M).
The biggest inflow on Oct 19 was to IBIT at +$665.2M.
Strategy now holds 848,517 BTC after purchasing 267 BTC.

BTC didn't make much progress during the last window. It finished where it started at $83,758.7 on 11 October and ended at a slightly lower $83,012.4 on 20 October, down 0.89% for the period. It held a tight trading range. ETF activity was dominated by inflows of $549.9 million on the 19th and 20th. Strategy added BTC as well.
Prices are UTC day closes (Investing.com, matched with CoinGecko).
There was no major BTC-related news. This was the largest single-day drop for the period. ETFs saw outflows of $65.4 million, all of it from IBIT.
No major BTC-related news. BTC recovered most of the previous day's drop. ETFs saw inflows of $175.7 million (IBIT +$65.9 million, FBTC +$103.1 million).
The U.S. CPI for September was released and showed headline CPI at 3.7% year over year (y/y), slightly above expectations, with core CPI at 2.6% y/y, also slightly above estimates. BTC sold off within five minutes of the release and fell from $83,860 to $82,731 (BeInCrypto).
ETFs saw outflows of $261.4 million, with FBTC and IBIT funds seeing outflows of $152.7 million and $110.9 million respectively.
A broad crypto sell-off hit during the day, and BTC recovered to close at $82,227.5, a gain of 0.70% for the day. ETFs saw a small net inflow of $5.1 million.
It closed down 0.78% for the day. ETFs saw outflows of $82.4 million, taking 12-16 October period to -$228.4 million.
This was the lowest close for the window.
Up 0.78% for the day. Strategy added 267 BTC for $22.1 million according to their weekly filing covering the period 12-18 October.
Spot BTC ETFs reported inflows of +$526.7M, the biggest day in about a month. BTC prices were soft, but that did not stop inflows to spot BTC ETFs.
BlackRock’s IBIT reported inflows of +$665.2M, partially offset by FBTC (-$83.6M) and GBTC (-$54.9M) outflows.
A strong price day, with modest inflows to BTC spot ETFs of +$23.2M.
IBIT (+$29.9M) and FBTC (+$3.6M) saw inflows, while BITB (-$10.3M) saw outflows.
BTC held the $83K area.

12-16 Oct: -$228.4M total (−$65.4M, +$175.7M, −$261.4M, +$5.1M, −$82.4M).
19-20 Oct: +$549.9M total (+$526.7M, +$23.2M).
12-20 Oct: approx. +$321.5M net inflows.
Total net assets are approx. $106.3B, and total net inflows are approx. $57.4B (20 Oct).

IBIT: approx. 811,478 BTC
FBTC: approx. 176,390 BTC
GBTC: approx. 125,270 BTC
Grayscale Mini Trust: approx. 63,034 BTC
BITB: approx. 37,193 BTC

As of 18 Oct, Strategy (MSTR) holds 848,517 BTC (19 Oct filing). It bought 267 BTC over 12-18 Oct for $22.1M, averaging $82,900/BTC.
Its average cost per BTC is about $75,446. The week prior (5-11 Oct), MSTR added 250 BTC at an average price of $86,194/BTC and held 848,250 BTC.
Bitcoin Core 32.0 was scheduled for release on 10 Oct but I couldn’t confirm it was released. It includes faster block validation, better fee estimation and security fixes.
Bitcoin Core still has 31.1 listed as the latest version on its download page.
There is no consensus change in 32.0, so it’s not a price event.
About 95.72% of Bitcoin’s 21 million supply has been mined. There are 20,101,715 BTC in circulation and 898,285 BTC left to mine.
About 1.29 million BTC (6.42% of circulating supply, about $107 billion at the 20 Oct close) are held by U.S. spot ETFs, and about 1.22 million BTC (6.07%, about $101 billion) are held by publicly traded companies.
Strategy alone holds 848,517 BTC, about 70% of all public-company holdings.
Satoshi is believed to have mined about 1.1 million (an estimate). Retail holdings, defined as wallets that hold less than 1 BTC, are about 1.4 million BTC (a proxy, as of 14 Oct).

It is estimated that support is at about $81,500 and resistance is at about $83,500 to $84,000.
ETFs have experienced large outflows and large inflows, with the inflows being larger.
As the FOMC meeting is on 27-28 Oct, we should see if BTC can break above $84K.
Data and Sources: Price Data from CoinGecko and Investing.com, ETF inflows and outflows from Farside and SoSoValue-based reports, ETF Holdings from BitcoinTreasuries.net and Bitbo, Supply data from CoinMarketCap and CoinGecko, and Strategy from SEC filings.
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