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WHAT MOVED THE MARKET TODAY

ARK Innovation ETF

41 stocks · cap-weighted, ETF-derived weights · Oct 9, 2026 close
89.62
−2.91 (−3.14%)
ARKK 89.62 · −2.9 pts (−3.14%) 1Y
114.60100.9987.3973.7860.18EW +15.96%H 92.78 · Oct 5L 63.52 · Mar 30
Oct 8, 2025Jan 8, 2026Apr 10, 2026Jul 13, 2026Oct 9, 2026
Breadth
20 / 41
stocks fell with the index
Concentration
100%+
of the decline from CRCL, COIN, CBRS
Biggest driver
CRCL −4.41
CIRCLE INTERNET GROUP INC, −43.82%
Biggest offset
TWST +2.56
TWIST BIOSCIENCE CORP, +387.28%

What drove it

41 members · detractors first · 1Y · residual 1901.9bp exceeds 60bp gate

The ARKK fell 3.14% (−2.91 pts) over the past year, but 21 of 41 members went the other way. CRCL and COIN dragged the tape lower, contributing more than the entire move.

Read the latest market-close note: Goldman and Microsoft Push the Dow to a Large Gain While Telecoms Sink Communication Services

+16.8 pts from 23 gainers−22.5 pts from 18 losers
net −2.9 pts · losers outweigh gainers 1.3 to 1
Stock
Points
Return
ARKKsum of all 41 stocks
−2.9
100%
−3.14%
CRCLCIRCLE INTERNET GROUP INC
−4.4
152%
−43.82%
COINCOINBASE GLOBAL INC -CLASS A
−4.0
138%
−53.68%
CBRSCEREBRAS SYSTEMS INC - A
−2.3
79%
−47.22%
BMNRBITMINE IMMERSION TECHNOLOGI
−2.0
68%
−59.91%
KTOSKRATOS DEFENSE & SECURITY
−1.6
57%
−59.91%
CRWVCOREWEAVE INC-CL A
−1.4
49%
−41.36%
BLSHBULLISH
−1.4
49%
−51.67%
ACHRARCHER AVIATION INC-A
−1.1
39%
−60.11%
CRSPCRISPR THERAPEUTICS AG
−1.0
34%
−30.46%
TEMTEMPUS AI INC-CL A
−0.6
21%
−31.30%
WGSGENEDX HOLDINGS CORP
−0.6
20%
−45.12%
NTLAINTELLIA THERAPEUTICS INC
−0.6
20%
−46.59%
XEX-ENERGY INC
−0.5
16%
−53.05%
SPCXSPACE EXPLORATION TECHN-CL A
−0.4
15%
+1.01%
SOFISOFI TECHNOLOGIES INC
−0.2
6%
−43.61%
11 othersclick to expand the full index
+2.0
68%
·
XYZBLOCK INC
+0.4
−14%
−4.77%
METAMETA PLATFORMS INC-CLASS A
+0.5
−16%
+0.37%
TERTERADYNE INC
+0.6
−20%
+176.15%
SHOPSHOPIFY INC - CLASS A
+0.6
−21%
+2.66%
ILMNILLUMINA INC
+0.6
−21%
+184.49%
NTRANATERA INC
+0.6
−22%
+132.85%
PLTRPALANTIR TECHNOLOGIES INC-A
+0.7
−23%
+13.89%
NVDANVIDIA CORP
+0.7
−24%
+21.39%
AMZNAMAZON.COM INC
+0.7
−25%
+16.52%
GOOGALPHABET INC-CL C
+0.8
−26%
+42.00%
BEAMBEAM THERAPEUTICS INC
+0.9
−29%
−4.81%
AMDADVANCED MICRO DEVICES
+1.3
−43%
+158.15%
TSLATESLA INC
+1.3
−43%
−12.76%
TXG10X GENOMICS INC-CLASS A
+2.4
−82%
+568.19%
TWSTTWIST BIOSCIENCE CORP
+2.6
−88%
+387.28%
Cap weighting, illustrated

CIRCLE INTERNET GROUP INC and SOFI TECHNOLOGIES INC moved almost identically (−43.82% vs −43.61%), yet CRCL moved the ARKK 23.5× as much. In a cap-weighted index, the bigger company's weight turns the same percentage move into far more points.

Attribution map

slicing the −2.91 pt move · cell size = points contributed · color = direction, intensity = return
CRCL−4.4 pts(−43.8%)
COIN−4.0 pts(−53.7%)
TWST+2.6 pts(+387.3%)
TXG+2.4 pts(+568.2%)
CBRS−2.3 pts(−47.2%)
BMNR−2.0 pts(−59.9%)
KTOS−1.6 pts(−59.9%)
CRWV−1.4 pts
BLSH−1.4 pts(−51.7%)
TSLA+1.3 pts(−12.8%)
AMD+1.3 pts(+158.2%)
ACHR−1.1 pts(−60.1%)
CRSP−1.0 pts(−30.5%)
BEAM+0.9 pts
GOOG+0.8 pts
AMZN+0.7 pts
NVDA+0.7 pts(+21.4%)
PLTR+0.7 pts(+13.9%)
NTRA+0.6 pts
ILMN+0.6 pts
TEM−0.6 pts
SHOP
WGS−0.6 pts
TER+0.6 pts
NTLA−0.6 pts
META
SPCX−0.4 pts
XYZ+0.4 pts
NET
HOOD
PACB
AVGO
TSM
VCYT
BWXT

Concentration curve

cumulative share of the −2.91 pt move · sorted by contribution
0%50%100%10213141stocks:3 stocks = 369%100% covered at 1

When they drove it

cumulative points through the period
0CRCL −4.41COIN −4.02CBRS −2.31TWST +2.56TXG +2.38TSLA +1.25Oct 8Oct 9

Breadth

member returns, this period
−100%+100%+300%+500%
From −60.11% (ACHR) to +568.19% (TXG). Equal-weight, the ARKK would be +15.96% vs the actual −3.14%; the gap is what cap weighting did.

By sector

point contribution · sums to −2.91 pts
Unknown41
−5.7

The year, session by session

every trading day of 2026 · hover for the move
JANFEBMARAPRMAYJUNJULAUGSEPOCT

Share this move

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