DAILY MARKET BRIEFING
23 SEPTEMBER 2026
S&P 500
7,706.03
-0.76%
NASDAQ
26,936.04
-0.69%
DOW
51,511.59
-1.03%
RUSSELL
2,838.66
-1.28%
FTSE
10,705.30
-0.31%
DAX
25,410.63
-0.64%
VIX
15.18
+2.08%
US 10Y
5.11%
+15 bp
BTC
86,172.28
-0.50%
ETH
2,684.69
-2.47%
U.S. CLOSE EDITION
VICR leads, ALKT lags — U.S. market close
SharpeIQ Research Desk · data as of 23 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. VICR led gainers at +26.47%
2
Vol. 6 semis are realizing above implied (HV/IV > 1).
3
Laggards. ALKT led decliners at -21.12%.
1 Global Dashboard
Close-to-close moves across US equity indices, rates and crypto. Front-month contracts: Brent Crude +3.86%; WTI Crude -2.57%; Silver -2.35%.
Index / Contract Last 1 Day 1 Wk 1 Mo YTD 52-Wk Range Trend
US EQUITY INDICES
S&P 500
7,706.03
-0.76%
+1.59%
+0.41%
+12.57%
6,343.72
7,798.99
Nasdaq Composite
26,936.04
-0.69%
+3.67%
+2.89%
+15.89%
20,794.64
27,122.09
Dow Jones Industrial
51,511.59
-1.03%
-1.12%
-3.31%
+7.17%
45,166.64
54,349.12
Russell 2000
2,838.66
-1.28%
-1.10%
-5.94%
+14.37%
2,305.11
3,068.42
INTERNATIONAL
FTSE 100 (UK)
10,705.30
-0.31%
+0.44%
-1.03%
+7.79%
9,350.40
10,910.60
DAX (Germany)
25,410.63
-0.64%
+0.03%
-2.67%
+3.76%
22,300.75
26,569.99
RATES & VOLATILITY
CBOE VIX
15.18
+2.08%
-11.74%
+0.33%
+1.54%
13.47
31.05
US 10-Year Yield
5.11%
+15 bp
+12 bp
+38 bp
+95 bp
3.95%
5.11%
US 30-Year Yield
5.40%
+10 bp
+4 bp
+12 bp
+56 bp
4.54%
5.40%
US 5-Year Yield
5.00%
+16 bp
+17 bp
+57 bp
+128 bp
3.51%
5.00%
CRYPTO (24H)
Bitcoin
86,172.28
-0.50%
+12.79%
+11.33%
-1.53%
58,558.86
124,752.53
Ethereum
2,684.69
-2.47%
+2.81%
+12.26%
-9.52%
1,564.82
4,527.65
ENERGY
WTI Crude
92.16
-2.57%
-10.03%
+8.41%
+60.50%
55.27
112.95
Brent Crude
103.08
+3.86%
-2.60%
+11.84%
+69.40%
58.92
118.35
Natural Gas
3.02
+1.96%
+4.57%
+8.66%
-17.99%
2.52
7.46
METALS
Gold
4,318.40
-1.33%
-1.57%
-8.08%
-0.52%
3,855.20
5,318.40
Silver
64.38
-2.35%
+0.15%
-6.07%
-8.20%
46.00
115.08
Copper
6.68
-1.21%
+3.83%
+1.20%
+18.61%
4.70
6.80
Table 1. Close-to-close through 23 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
225.51
-1.47%
+5.43%
+21.06%
31%
2nd
40%
1.29
AMD
Adv. Micro Devices
614.61
-1.47%
+19.92%
+186.99%
49%
17th
56%
1.14
AVGO
Broadcom
354.99
-2.62%
+4.56%
+2.95%
37%
4th
37%
1.02
AMAT
Applied Materials
474.38
+0.41%
+14.20%
+85.05%
43%
19th
52%
1.22
TXN
Texas Instruments
272.62
+0.65%
+3.49%
+59.78%
44%
77th
29%
0.65
MU
Micron
1,071.88
-2.22%
+15.69%
+275.77%
59%
14th
56%
0.95
SNDK
SanDisk
1,816.57
-3.73%
+19.51%
+665.26%
68%
6th
90%
1.31
WDC
Western Digital
473.69
+1.96%
+13.60%
+175.17%
65%
21st
61%
0.94
STX
Seagate
923.86
+5.30%
+19.70%
+235.47%
65%
27th
70%
1.08
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
337.02
-0.80%
+24.31%
MSFT
Microsoft
500.59
+0.52%
+4.17%
GOOGL
Alphabet
337.83
-3.80%
+8.14%
AMZN
Amazon
249.27
-2.24%
+7.99%
META
Meta Platforms
744.10
+1.02%
+12.93%
TSLA
Tesla
380.12
+0.32%
-15.48%
NFLX
Netflix
71.36
-1.11%
-23.89%
Table 3. Same conventions as Table 2 (price only).
IMPLIED VS REALIZED — SEMIS
20 20 40 40 60 60 80 80 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
VICR
Vicor Corp
283.16
+26.47%
FSLY
Fastly, Inc.
29.65
+13.69%
BETA
Beta Technologies, Inc.
24.34
+10.29%
BLLN
Billiontoone, Inc.
114.42
+10.17%
FORM
Formfactor Inc
131.26
+10.02%
TNGX
Tango Therapeutics, Inc.
24.45
+9.49%
TOP LOSERS
Ticker Name Last 1 Day
ALKT
Alkami Technology, Inc.
14.60
-21.12%
NKTR
Nektar Therapeutics
57.66
-13.73%
PAY
Paymentus Holdings, Inc.
29.95
-13.19%
WGS
Genedx Holdings Corp.
85.20
-12.91%
PLNT
Planet Fitness, Inc.
41.00
-12.86%
CHYM
Chime Financial, Inc.
26.46
-11.56%
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
ATM IV CRUSH
Ticker Name ATM IV Δ 1 Day IV %ile
AMAT
Applied Materials Inc /De
43%
-6.19%
19th
SNDK
Sandisk Corp
68%
-4.60%
6th
AMD
Advanced Micro Devices Inc
49%
-1.59%
17th
STX
Seagate Technology Holdings Plc
65%
-0.95%
27th
AVGO
Broadcom Inc.
37%
-0.79%
4th
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: 9 buy / 31 sell prints (buy/sell ratio 0.29), led by SOFI, KEY, BRO.
Insider buy/sell ratio
today 0.29
parity 1.00
FORM 4 FILINGS
Filed Insider · Title Ticker Name Side Shares Value
09-23
Keough Kelli · EVP, GBUL, SIPS
SOFI
Sofi Technologies, Inc.
SELL 10,203
$173K
09-23
Rishel Jeremy · Chief Technology Officer
SOFI
Sofi Technologies, Inc.
SELL 18,624
$326K
09-23
Gorman Christopher M. · Director, Chairman and CEO
KEY
Keycorp /New/
SELL 29,821
—
09-23
Hunt James S · Director
BRO
Brown & Brown, Inc.
SELL 5,000
—
09-23
ROTHBLATT MARTINE A · Director, Chairperson & CEO
UTHR
United Therapeutics Corp
BUY 9,500
$1.1M
09-23
ROTHBLATT MARTINE A · Director, Chairperson & CEO
UTHR
United Therapeutics Corp
SELL 240
$118K
Table 6. Notable Form 4 filings; value = reported transaction value.
DESK BRIEFING
•
AAPL — With new Macs, Apple aims to take on Microsoft, Nvidia in a rush to lower AI costs · Reuters.
•
MSFT — Microsoft Stock Gets Another Upgrade, Price-Target Hike · Investor's Business Daily.
•
MU — Dow Jones Futures: Nasdaq Hits New High; Sandisk, Micron Trigger Buy Signals · Investor's Business Daily.
•
NFLX — Netflix Stock Downgraded As YouTube Swipes Viewers · Investor's Business Daily.
•
NFLX — HSBC sends blunt message to Netflix stock investors · TheStreet.
•
NVDA — Nvidia once rattled IonQ stock. Now it plans to install IonQ tech · TheStreet.
•
AMD — AMD just hit a milestone that reshuffles the AI chip race · TheStreet.
•
META — Bank of America backs Meta stock after Muse surprise · TheStreet.
THE WEEK AHEAD
When Event
Thu 24 Sep
HM-B.ST earnings — today
Thu 24 Sep
DRI earnings — today
Fri 25 Sep
COST earnings — tomorrow
Tue 29 Sep
CCL earnings — in 5 days
Wed 30 Sep
FDS earnings — in 6 days
Wed 30 Sep
JBL earnings — in 6 days
Thu 1 Oct
MU earnings — in 7 days
Thu 1 Oct
ACN earnings — in 7 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
23 SEPTEMBER 2026