DAILY MARKET BRIEFING
21 SEPTEMBER 2026
S&P 500
7,764.70
+1.49%
NASDAQ
27,122.09
+2.26%
DOW
52,048.83
+0.71%
RUSSELL
2,875.36
+0.52%
FTSE
10,739.00
+0.75%
DAX
25,575.01
+1.07%
VIX
14.87
+0.41%
US 10Y
4.96%
-4 bp
BTC
81,284.89
+0.18%
ETH
2,659.53
+0.63%
U.S. CLOSE EDITION
GRAL leads, CXW lags — U.S. market close
SharpeIQ Research Desk · data as of 21 Sep 2026 close
A close-to-close read on the latest session across US equity indices, rates, commodities, the semiconductor complex and options volatility, with notable insider filings and headlines.
1
Movers. GRAL led gainers at +33.68%
2
Vol. 6 semis are realizing above implied (HV/IV > 1).
3
Laggards. CXW led decliners at -8.00%.
1 Global Dashboard
Close-to-close moves across US equity indices, rates and crypto. Front-month contracts: WTI Crude -7.43%; Brent Crude -6.74%; Copper +2.87%.
Index / Contract Last 1 Day 1 Wk 1 Mo YTD 52-Wk Range Trend
US EQUITY INDICES
S&P 500
7,764.70
+1.49%
+1.90%
+1.62%
+13.43%
6,343.72
7,798.99
Nasdaq Composite
27,122.09
+2.26%
+3.57%
+4.05%
+16.69%
20,794.64
27,122.09
Dow Jones Industrial
52,048.83
+0.71%
-0.71%
-1.35%
+8.29%
45,166.64
54,349.12
Russell 2000
2,875.36
+0.52%
-0.58%
-3.91%
+15.85%
2,305.11
3,068.42
INTERNATIONAL
FTSE 100 (UK)
10,739.00
+0.75%
+0.39%
-0.09%
+8.13%
9,299.80
10,910.60
DAX (Germany)
25,575.01
+1.07%
+0.53%
-2.15%
+4.43%
22,300.75
26,569.99
RATES & VOLATILITY
CBOE VIX
14.87
+0.41%
-13.04%
-7.12%
-0.54%
13.47
31.05
US 10-Year Yield
4.96%
-4 bp
0 bp
+27 bp
+80 bp
3.95%
5.01%
US 30-Year Yield
5.30%
-4 bp
-3 bp
+6 bp
+46 bp
4.54%
5.36%
US 5-Year Yield
4.83%
-2 bp
+4 bp
+45 bp
+111 bp
3.51%
4.86%
CRYPTO (24H)
Bitcoin
81,284.89
+0.18%
+6.74%
+3.48%
-7.11%
58,558.86
124,752.53
Ethereum
2,659.53
+0.63%
+10.07%
+7.81%
-10.36%
1,564.82
4,687.77
ENERGY
WTI Crude
92.85
-7.43%
-8.42%
+5.72%
+61.70%
55.27
112.95
Brent Crude
96.87
-6.74%
-8.34%
+3.29%
+59.19%
58.92
118.35
Natural Gas
2.84
-2.54%
-2.00%
+3.84%
-23.01%
2.52
7.46
METALS
Gold
4,379.10
-1.04%
+0.63%
-4.21%
+0.88%
3,771.10
5,318.40
Silver
66.56
-0.00%
+4.79%
-2.16%
-5.10%
44.70
115.08
Copper
6.80
+2.87%
+7.50%
+5.34%
+20.87%
4.57
6.80
Table 1. Close-to-close through 21 Sep. Rate changes in basis points; crypto is 24-hour; commodities are front-month contracts. Trend = trailing two weeks.
2 Semiconductors & Technology
Semiconductor and megacap-tech price action by horizon.
SEMICONDUCTOR COMPLEX — PRICE & VOLATILITY
Ticker Name Spot 1 Day 1 Wk YTD ATM IV IV %ile 30d HV HV/IV
NVDA
NVIDIA
227.38
+2.30%
+7.78%
+22.07%
30%
0th
40%
1.35
AMD
Adv. Micro Devices
615.52
+9.95%
+24.75%
+187.41%
49%
17th
56%
1.15
AVGO
Broadcom
362.66
+1.41%
+5.20%
+5.17%
35%
2nd
37%
1.04
AMAT
Applied Materials
464.24
+4.42%
+9.44%
+81.10%
43%
19th
52%
1.22
TXN
Texas Instruments
270.87
+1.59%
+2.83%
+58.76%
39%
56th
29%
0.75
MU
Micron
1,043.96
+2.77%
+12.98%
+265.99%
58%
13th
54%
0.94
SNDK
SanDisk
1,766.64
-1.41%
+13.83%
+644.22%
67%
4th
91%
1.35
WDC
Western Digital
448.17
+1.54%
+4.97%
+160.35%
60%
12th
60%
1.00
STX
Seagate
877.33
+2.16%
+8.91%
+218.58%
62%
21st
68%
1.11
Table 2. Price by horizon + at-the-money implied vol (≈30-day, annualized), 52-week IV percentile, trailing 30-session realized vol and HV/IV. HV/IV > 1.0 (highlighted) = realizing more than implied. Memory/storage tickers highlighted.
MEGACAP TECHNOLOGY
Ticker Name Spot 1 Day YTD Trend
AAPL
Apple
338.98
+0.85%
+25.03%
MSFT
Microsoft
501.61
+1.59%
+4.38%
GOOGL
Alphabet
354.97
+1.55%
+13.63%
AMZN
Amazon
258.45
+1.87%
+11.97%
META
Meta Platforms
741.25
+11.34%
+12.50%
TSLA
Tesla
375.30
+3.03%
-16.55%
NFLX
Netflix
73.36
+2.19%
-21.76%
Table 3. Same conventions as Table 2 (price only).
IMPLIED VS REALIZED — SEMIS
20 20 40 40 60 60 80 80 100 100 IV = HV · parity NVDA AMD AVGO AMAT TXN MU SNDK WDC STX
Implied volatility (%)
30-day realized vol (%)
Figure 1. Above the dashed parity line = realizing more than options imply. Memory/storage highlighted.
3 Session Movers
The session's largest one-day moves in the liquid optionable universe.
TOP GAINERS
Ticker Name Last 1 Day
GRAL
Grail, Inc.
107.97
+33.68%
ARM
Arm Holdings Plc /Uk
322.90
+17.16%
FSLY
Fastly, Inc.
27.42
+14.92%
AXTI
Axt Inc
79.93
+14.14%
FIVN
Five9, Inc.
37.01
+13.98%
ALAB
Astera Labs, Inc.
340.74
+12.36%
TOP LOSERS
Ticker Name Last 1 Day
CXW
Corecivic, Inc.
32.41
-8.00%
NVO
Novo Nordisk A S
39.80
-7.96%
RSI
Rush Street Interactive, Inc.
21.57
-7.42%
ZTO
Zto Express (Cayman) Inc.
19.45
-7.20%
MHK
Mohawk Industries Inc
117.27
-7.00%
BBT
Beacon Financial Corp
28.75
-6.75%
Table 4. Largest one-day moves, liquid U.S. optionable universe (known market cap ≥ $2B). Bars scaled within each panel.
4 Options & Implied Volatility
ATM implied-volatility movers and the semiconductor vol board.
ATM IV RISERS
Ticker Name ATM IV Δ 1 Day IV %ile
TXN
Texas Instruments Inc
39%
+2.22%
56th
MU
Micron Technology Inc
58%
+1.27%
13th
AVGO
Broadcom Inc.
35%
+1.11%
2nd
ATM IV CRUSH
Ticker Name ATM IV Δ 1 Day IV %ile
AMAT
Applied Materials Inc /De
43%
-6.19%
19th
WDC
Western Digital Corp
60%
-3.02%
12th
SNDK
Sandisk Corp
67%
-2.06%
4th
STX
Seagate Technology Holdings Plc
62%
-1.75%
21st
AMD
Advanced Micro Devices Inc
49%
-1.59%
17th
Table 5. ATM implied-volatility movers across the semiconductor complex — Δ in vol points vs. prior close; percentile over 52 weeks.
5 Insider Filings, Desk Briefing & Week Ahead
Form 4 flow today: 11 buy / 29 sell prints (buy/sell ratio 0.38), led by IEX, CRBG, EQH.
Insider buy/sell ratio
today 0.38
parity 1.00
FORM 4 FILINGS
Filed Insider · Title Ticker Name Side Shares Value
09-18
Tereso Tara M. · Group Executive, HST
IEX
Idex Corp /De/
SELL 290
$65K
09-18
Simmons William L. · Group Executive, FMT & FSDP
IEX
Idex Corp /De/
SELL 218
$49K
09-18
NIPPON LIFE INSURANCE CO · 10% Owner
CRBG
Corebridge Financial, Inc.
BUY 320,785
$11.2M
09-18
MacKay Craig C · Director
EQH
Equitable Holdings, Inc.
SELL 2,000
$109K
09-18
Cardenuto Rodolpho C · Director
SMTC
Semtech Corp
SELL 5,321
$878K
09-18
Vohra Tajinder S · Please See Remarks
RVTY
Revvity, Inc.
SELL 7,330
$1.0M
Table 6. Notable Form 4 filings; value = reported transaction value.
DESK BRIEFING
•
TSLA — Tesla faces major trial for alleged bias against Black workers, after years of lawsuits · Reuters.
•
NVDA — Stock Market Today: Dow Rallies 450 Points As Oil Prices, Treasury Yields Fall; Nvidia Extends Gains (Live Coverage) · Investor's Business Daily.
•
AAPL — Apple's $1,999 foldable iPhone creates strange twist for Samsung · TheStreet.
•
AAPL — Your iPhone gives Apple an advantage you may not be comfortable with. · TheStreet.
•
AVGO — Jim Cramer shares a strong verdict on Broadcom stock for investors · TheStreet.
•
MU — A $2.75 Billion Reason to Buy Micron Stock · Barchart.
•
TSLA — Dear Tesla Stock Fans, Mark Your Calendars for September 30 · Barchart.
•
NVO — Novo Nordisk (CPSE:NOVO B) Unveiled A 2030 Blockbuster Drug Plan · Simply Wall St..
THE WEEK AHEAD
When Event
Tue 22 Sep
AZO earnings — today
Wed 23 Sep
CTAS earnings — tomorrow
Wed 23 Sep
GIS earnings — tomorrow
Wed 23 Sep
PAYX earnings — tomorrow
Thu 24 Sep
HM-B.ST earnings — in 2 days
Thu 24 Sep
DRI earnings — in 2 days
Thu 24 Sep
COST earnings — in 2 days
Table 7. Upcoming earnings, next three weeks.
For informational purposes only — not investment advice, a recommendation, or an offer to buy or sell any security. Data may contain errors or omissions.
DAILY MARKET BRIEFING
sharpeiq.com/research
21 SEPTEMBER 2026