DAILY MARKET BRIEFING 17 SEPTEMBER 2026

S&P 500 7,637.76 +1.14% NASDAQ 26,418.30 +1.69% DOW 51,778.04 +0.61% RUSSELL 2,874.63 +0.55% FTSE 10,816.10 +1.19% DAX 25,716.71 +0.70% VIX 15.44 -12.82% US 10Y 4.95% -6 bp BTC 76,269.04 +0.16% ETH 2,430.11 +0.58%

U.S. CLOSE EDITION

GNRC leads, FLNC lags — U.S. market close

SharpeIQ Research Desk · data as of 17 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. GNRC led gainers at +18.34%

2 Vol. 4 semis are realizing above implied (HV/IV > 1).

3 Laggards. FLNC led decliners at -15.36%.

1 Global Dashboard

Close-to-close moves across US equity indices, rates and crypto. Front-month contracts: Copper +2.41%; Silver +1.84%; Brent Crude -0.95%.

Index / ContractLast1 Day1 Wk1 MoYTD52-Wk RangeTrend

US EQUITY INDICES

S&P 500 7,637.76 +1.14% +0.61% -0.70% +11.57% 6,343.72 7,798.99

Nasdaq Composite 26,418.30 +1.69% +1.29% +0.49% +13.67% 20,794.64 27,093.90

Dow Jones Industrial 51,778.04 +0.61% -0.55% -2.93% +7.73% 45,166.64 54,349.12

Russell 2000 2,874.63 +0.55% -0.56% -4.75% +15.82% 2,305.11 3,068.42

INTERNATIONAL

FTSE 100 (UK) 10,816.10 +1.19% +1.95% +0.82% +8.91% 9,214.00 10,910.60

DAX (Germany) 25,716.71 +0.70% +1.40% -1.44% +5.01% 22,300.75 26,569.99

RATES & VOLATILITY

CBOE VIX 15.44 -12.82% -13.45% -2.53% +3.28% 13.47 31.05

US 10-Year Yield 4.95% -6 bp 0 bp +24 bp +78 bp 3.95% 5.01%

US 30-Year Yield 5.30% -5 bp -6 bp +1 bp +46 bp 4.54% 5.36%

US 5-Year Yield 4.80% -6 bp +7 bp +43 bp +108 bp 3.51% 4.86%

CRYPTO (24H)

Bitcoin 76,269.04 +0.16% -1.30% -4.97% -12.84% 58,558.86 124,752.53

Ethereum 2,430.11 +0.58% -3.79% -3.20% -18.10% 1,564.82 4,687.77

ENERGY

WTI Crude 101.91 -0.51% -0.56% +19.98% +77.48% 55.27 112.95

Brent Crude 104.82 -0.95% -2.61% +15.16% +72.26% 58.92 118.35

Natural Gas 2.90 +0.35% +2.36% +4.50% -21.30% 2.52 7.46

METALS

Gold 4,399.70 +0.28% -0.17% -0.47% +1.35% 3,768.10 5,318.40

Silver 65.47 +1.84% +1.84% +2.39% -6.65% 43.78 115.08

Copper 6.59 +2.41% +1.85% +1.60% +16.99% 4.54 6.80

Table 1. Close-to-close through 17 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

TickerNameSpot1 Day1 WkYTDATM IVIV %ile30d HVHV/IV

NVDA NVIDIA 219.34 +2.54% +0.45% +17.75% 33% 7th 40% 1.22

AMD Adv. Micro Devices 545.09 +6.36% +8.24% +154.52% 51% 25th 50% 0.97

AVGO Broadcom 347.30 +2.29% -3.75% +0.72% 36% 2nd 36% 1.00

AMAT Applied Materials 417.40 +0.49% -8.06% +62.82% 49% 35th 46% 0.95

TXN Texas Instruments 258.14 -0.97% -0.26% +51.30% 38% 51st 28% 0.75

MU Micron 977.50 +5.50% +0.01% +242.69% 59% 15th 53% 0.91

SNDK SanDisk 1,614.39 +6.21% -4.62% +580.09% 68% 6th 93% 1.36

WDC Western Digital 423.87 +1.65% -8.04% +146.23% 63% 17th 72% 1.14

STX Seagate 803.13 +2.55% -6.87% +191.63% 65% 30th 67% 1.03

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

TickerNameSpot1 DayYTDTrend

AAPL Apple 337.00 +1.38% +24.30%

MSFT Microsoft 497.75 +1.52% +3.57%

GOOGL Alphabet 347.33 +1.30% +11.18%

AMZN Amazon 251.19 +2.13% +8.83%

META Meta Platforms 682.31 +1.34% +3.55%

TSLA Tesla 366.20 +2.27% -18.57%

NFLX Netflix 75.31 -1.44% -19.68%

Table 3. Same conventions as Table 2 (price only).

IMPLIED VS REALIZED — SEMIS

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

TickerNameLast1 Day

GNRC Generac Holdings Inc. 207.23 +18.34%

VICR Vicor Corp 216.39 +17.66%

TEM Tempus Ai, Inc. 80.36 +14.85%

PURR Hyperliquid Strategies Inc 12.83 +12.15%

OKLO Oklo Inc. 39.65 +11.31%

CRSP Crispr Therapeutics Ag 57.33 +9.80%

TOP LOSERS

TickerNameLast1 Day

FLNC Fluence Energy, Inc. 7.66 -15.36%

AN Autonation, Inc. 174.88 -10.49%

MTZ Mastec Inc 207.75 -7.92%

DKNG Draftkings Inc. 22.47 -7.64%

TTAN Servicetitan, Inc. 54.25 -7.53%

XRAY Dentsply Sirona Inc. 9.38 -7.50%

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

TickerNameATM IVΔ 1 DayIV %ile

AMD Advanced Micro Devices Inc 51% +1.11% 25th

AVGO Broadcom Inc. 36% +0.95% 2nd

MU Micron Technology Inc 59% +0.63% 15th

SNDK Sandisk Corp 68% +0.63% 6th

ATM IV CRUSH

TickerNameATM IVΔ 1 DayIV %ile

STX Seagate Technology Holdings Plc 65% -2.38% 30th

WDC Western Digital Corp 63% -0.79% 17th

TXN Texas Instruments Inc 38% -0.63% 51st

AMAT Applied Materials Inc /De 49% -0.48% 35th

NVDA Nvidia Corp 33% -0.16% 7th

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: 33 buy / 7 sell prints (buy/sell ratio 4.71), led by UMC, NXPI, KVYO.

Insider buy/sell ratio today 4.71 parity 1.00

FORM 4 FILINGS

FiledInsider · TitleTickerNameSideSharesValue

09-17 Liu Chitung · CFO & SVP UMC United Microelectronics Corp SELL 1,200,000 $170.8M

09-17 Liu Chitung · CFO & SVP UMC United Microelectronics Corp SELL 400,000 $58.0M

09-17 Micallef Andrew · EVP, Chief Operations Officer NXPI Nxp Semiconductors N.V. SELL 1,000 $226K

09-17 Smith Erica Ellen · Chief Financial Officer KVYO Klaviyo, Inc. BUY 821,917 —

09-17 Smith Erica Ellen · Chief Financial Officer KVYO Klaviyo, Inc. BUY 328,767 —

09-16 ARNOLD FRANCES · Director GOOGL Alphabet Inc. BUY 0 —

Table 6. Notable Form 4 filings; value = reported transaction value.

DESK BRIEFING

• TXN — TEXAS INSTRUMENTS INC issued a Regulation FD disclosure (SEC 8-K).

• AMZN — Amazon enters AI safety fray, calls for "rigorous testing," safeguards · Reuters.

• AMZN — Generac Up on Amazon Agreement; Coreweave Kicks Off Fundraising | Stock Movers · Bloomberg.

• AMAT — Applied Materials to invest $5 billion in India as Modi's flagship chip event kicks off · Reuters.

• NVDA — 4 Investors Own More Nvidia Stock Than Its Founder Jen-Hsun Huang · Investor's Business Daily.

• AMD — Dow Jones Futures Rise After Hawkish Fed, Warsh Hit Stocks, Trump Fumes; AMD, Bloom Energy Eye Buy Points · Investor's Business Daily.

• AMD — AMD, IBD Stock Of The Day, Gains As Heavyweights Dismiss AI Slowdown · Investor's Business Daily.

• TSLA — Regulators Grill Tesla Over Cybercab Design · Investor's Business Daily.

THE WEEK AHEAD

WhenEvent

Tue 22 Sep AZO earnings — in 4 days

Wed 23 Sep CTAS earnings — in 5 days

Wed 23 Sep GIS earnings — in 5 days

Wed 23 Sep PAYX earnings — in 5 days

Thu 24 Sep DRI earnings — in 6 days

Thu 24 Sep COST earnings — in 6 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 17 SEPTEMBER 2026