Simplify Analytics
WDC

WDC

single name · Core universe$441.36 unadjusted close, 2026-09-18as of 2026-09-20in your book →
book spot $423.87 (unadjusted close, 2026-09-17)gamma flip $444.20 (+0.89 ATR from book spot) · 2026-09-17call wall $400.00 (-5.63% from book spot) · 2026-09-17put wall $420.00 (-0.91% from book spot) · 2026-09-17max pain $450.00 (+6.16% from book spot, 2026-10-16 monthly) · 2026-09-17200-session mean $385.67 (close 14.44% above it) · 2026-09-18

Peers today: 16 names — the Core singles XLK held on its 2026-08-12 composition.

The 5 most unusual now — this name's registered metrics ordered by |robust z|, computed in core.metric_context(). Codes, price levels and readings below n_min are not facts and are not listed.

The 5 most unusual now — this name's registered metrics ordered by |robust z|, computed in core.metric_context(). Codes, price levels and readings below n_min are not facts and are not listed.
metricvaluevalue_dateown-history percentilerobust z
term-structure runiv_term_regime_days-312026-09-18own all (<3y) 0.2% · n=241-2.40 · n=241
1-session returnret_1d4.13%2026-09-18own 3y 87.8% · n=7501.76 · n=2525
call wall distancecall_wall_distance_pct-5.63%2026-09-17own all (<3y) 0.8% · n=64-1.56 · n=64
30-day IViv_cm_30d63.3%2026-09-18own all (<3y) 7.9% · n=241-1.54 · n=241
max pain distancemax_pain_distance_pct6.16%2026-09-17own all (<3y) 80.5% · n=641.35 · n=64

Technicals

own 3y 31.9% · n=750 · 2026-09-18peers today 21.9% · n=16 · 2026-09-18

from options: Chain levels from the 2026-09-17 book, on the price line: gamma flip $444.20; call wall $400.00; put wall $420.00.from earnings: 4 reports since 2025-09-21 marked on the chart. The latest with an implied move, 2026-08-05, moved -13.03% against 8.98% implied.

WDC close$441.362026-09-18gamma flip$444.202026-09-17volume13,392,2922026-09-18

250 sessions from 2025-09-21 · ER marks 4 past reports

price vs 200-session mean
14.44%
own 3y 31.9% · n=750
2026-09-18
drawdown from 252-session high
-40.84%
own 3y 2.2% · n=750
2026-09-18
realised vol, 21 sessions
49.4%
own 3y 58.1% · n=750
2026-09-18
1-session return
4.13%
own 3y 87.8% · n=750
2026-09-18
dollar volume, 21-session mean
$2.72B
own 3y 85.3% · n=750
2026-09-18

Price from core.prices_asof() - split- and price-factor-adjusted to the as-of date, dividends left in. Volume as collected. The flip overlay is this name's own gamma_flip_level on each session whose gamma_flip_state found one, bounded at what was knowable on the as-of date.

Options & IV

own all (<3y) 7.9% · n=241 · 2026-09-18peers today 71.9% · n=16 · 2026-09-18

from earnings: The next report (2026-10-29) falls after the 30-day IV's tenor from 2026-09-18: that IV does not span it.from technicals: 30-day IV 63.3% (2026-09-18) against 21-session realised vol 49.4% (2026-09-18).

30-day IV
63.3%
own all (<3y) 7.9% · n=241
2026-09-18
90-day IV
67.3%
own all (<3y) 9.3% · n=241
2026-09-18
term slope, 30d - 90d
-4.0 pts
own all (<3y) 20.5% · n=241
2026-09-18
term-structure run
-31
own all (<3y) 0.2% · n=241
2026-09-18
variance risk premium, 30d
+22.6 pts
own all (<3y) 89.2% · n=236
2026-09-18
25-delta risk reversal
-5.9 pts
own all (<3y) 4.3% · n=35
2026-09-17
10-delta risk reversal
-7.1 pts
own all (<3y) 12.9% · n=35
2026-09-17
net GEX
-$21.9m per 1%
own all (<3y) 14.8% · n=64
2026-09-17
0DTE share of volume
no reading for 2026-09-17
never observed
never observed

The whole chain and IV surface for WDC

Constant-maturity IV, the variance risk premium and skew from the vendor's interpolated surface; net GEX and the 0DTE share from the chain book of 2026-09-17. No export: the chain is the vendor's personal-use tier (ADR-0020).

Earnings reactions

own ratios 77.5% · n=20 · 2026-08-05peers' latest 53.1% · n=16 · 2026-08-05

from options: A 30-DTE option bought 2026-09-20 expires 2026-10-20: the report's first session (2026-10-29) falls after it.

realised / implied, median
0.97x
quartiles 0.44x – 1.34x · n=20
reports that moved more than implied
50%
n=20 reports with both figures
long straddle, 1d win rate
14%
n=21
long straddle, median 1d
-38.43%
n=21
Next report, for the quarter ending 2026-09-30
  • 2026-10-29 unknown · source estimation · first session it can move: 2026-10-29 (39 calendar days out)
2026-08-052026-06-30postmarket8.98%-13.03%1.45x+15.08%-35.72%
2026-04-302026-03-31postmarket7.11%-0.69%0.10x-94.63%+84.90%
2026-01-292025-12-31postmarket7.78%-10.12%1.30x-1.33%-15.16%
2025-10-302025-09-30postmarket7.21%+8.75%1.21x-13.58%-29.95%
2025-07-302025-06-30postmarket5.63%+10.16%1.80x+42.30%-74.56%
2025-04-302025-03-31premarket6.67%+7.98%1.19x-4.68%-24.26%
2025-01-292024-12-31postmarket5.08%+4.75%0.93x-45.64%+29.63%
2024-10-242024-09-30postmarket4.70%+4.72%1.00x-38.43%+22.20%
2024-07-312024-06-30postmarket5.89%-9.72%1.65x-24.00%-25.76%
2024-04-252024-03-31postmarket4.16%+2.76%0.66x-69.41%-5.47%
2024-01-252023-12-31postmarket4.38%-3.48%0.80x-61.74%+45.45%
2023-10-302023-09-30premarket4.43%+7.26%1.64x-0.69%-19.63%
2023-07-312023-06-30postmarket4.45%+0.73%0.16x-59.73%+54.20%
2023-05-082023-03-31postmarket5.04%-1.70%0.34x-62.04%+56.23%
2023-01-312022-12-31postmarket4.41%-1.43%0.32x-55.70%+48.29%
2022-10-272022-09-30premarket5.23%-2.66%0.51x-58.98%+43.64%
2022-08-052022-06-30premarket4.87%-5.65%1.16x-28.61%+17.96%
2022-04-282022-03-31postmarket4.80%+0.87%0.18x-89.61%+70.67%
2022-01-272021-12-31postmarket-7.32%-28.04%-13.02%
2021-10-282021-09-30postmarket-8.71%+37.50%-80.06%
2021-08-042021-06-30postmarket+3.28%-60.68%+46.10%
2021-04-292021-03-31postmarket-0.70%
2021-01-282020-12-31postmarket+7.18%
2020-10-282020-09-30postmarket-1.80%
2020-08-052020-06-30postmarket-16.12%

122 reports on this security, the newest 28 listed. An implied move is served from 2019-10-30 and the straddle returns from 2021-06-07, so n sits near its floor for names with a shorter history. One report a quarter, so the one-session windows never overlap and n is already the effective n.

core.earnings_events read point-in-time: the vintages that existed at the end of the as-of day, with the quarter and epoch flags re-derived over that set (migration 7a5161d44b1e). A past report is one that happened - the only date for its quarter, or one carrying actual EPS.

Short & borrow

own history 86.8% · n=87 · 2026-09-18peers today 65.6% · n=16 · 2026-09-18

from technicals: Fee 0.35% on 2026-09-18, with the price 40.84% below its 252-session high on 2026-09-18.

fee rate
0.35%
annualised · 2026-09-18
in its own accrued history
86.8%
n=87 days from 2026-05-15 · range 0.25–0.40%
rebate rate
3.53%
observed 2026-09-18 15:24:53
shares available
6,100,000
as the vendor last posted
0.35%2026-09-18
AMD0.43%2026-09-18
SNDK0.43%2026-09-18
DELL0.41%2026-09-18
MRVL0.36%2026-09-18
STX0.35%2026-09-18
WDC0.35%2026-09-18
PLTR0.30%2026-09-18
MSFT0.29%2026-09-18
AAPL0.28%2026-09-18
AVGO0.25%2026-09-18
CRWD0.25%2026-09-18
INTC0.25%2026-09-18
MU0.25%2026-09-18
NVDA0.25%2026-09-18
ORCL0.25%2026-09-18
PANW0.25%2026-09-18

Ranked 6 of 16 names with a snapshot on 2026-09-18. A peer whose newest snapshot falls on a different day - older or newer - is listed with that day and excluded from the rank, never compared across days.

core.borrow_rates, the accrued snapshot series. The percentile is the house midrank - (below + half the ties) / n - over one reading per ET day, computed in SQL and NULL below its floor. Fee rates sit on a general-collateral floor, so ties are the common case and the midrank is what keeps a floor reading from reading as the minimum.

News

own history 38.0% · n=54 · 2026-09-18peers today 37.5% · n=16 · 2026-09-18

from technicals: Busiest day since 2026-07-27: 2026-08-05, 2 headlines; that session returned -5.36%.

headlines on 2026-09-18
0
that session returned +4.13%
in its own day history
38.0%
n=54 complete days
against its peers that day
37.5%
5 of 16 names
partial day
0 on 2026-09-19
counted, never ranked: the feed is still being read
headlines02026-09-18session return+4.13%
  • 2026-09-17 04:38Tradexmajorsentiment: neutral
    U.S. crypto-linked, optical-networking and storage stocks are broadly higher premarket, led by $CRCL +3.65%, $AAOI +3.21%, $MSTR +2.58% and $WDC +2.05%.
    also tagged CRCL, AAOI, MSTR
  • 2026-09-14 08:02Business Wiresentiment: neutral
    Western Digital Announces Redemption of 3.00% Convertible Senior Notes Due 2028
  • 2026-08-26 09:55Tradexmajorsentiment: neutral
    Storage stocks rose while Neocloud names fell in early trade: $WDC +3.26%, $STX +2.44%, $GLXY -3.55% and $IREN -2.91%, per AInvest app data.
    also tagged STX, GLXY, IREN
  • 2026-08-24 16:12Business Wiresentiment: neutral
    WD to Participate in Upcoming Investor Conference
  • 2026-08-24 04:35Tradexmajorsentiment: neutral
    Semiconductor, memory and optical stocks fell in U.S. premarket trading. $AAOI dropped more than 11%, while $SNDK fell 4.08%, $MU 3.18%, $SKHY 3.02%, $WDC 2.61%, $LRCX 2.39%, $AMAT 2.05%, $ARM 1.96% and $INTC 1.70%, per AInvest app data.
    also tagged AAOI, SNDK, MU, SKHY, LRCX, AMAT, ARM, INTC
  • 2026-08-19 07:37Tradexmajorsentiment: neutral
    U.S. semis, memory and optical names are broadly lower. $AAOI -15.2%, $STX -9.2%, $SNDK -9.0%, $CIEN -8.9%, $MRVL -7.8%, $WDC -7.4%, $MU -7.0% and $INTC -6.6%. $NVDA -2.3%, $AMD -4.3%, $TSM -4.1%, $NOK -3.6%. SK hynix (KS:000660) -9.8%, per AInvest app data.
    also tagged AAOI, STX, SNDK, CIEN, MRVL, MU, INTC, NVDA, AMD, TSM, NOK, SK
  • 2026-08-17 08:48Tradexmajorsentiment: neutral
    Memory stocks are higher premarket, led by Kioxia's OTC ADR, $KXIAY, +14.2%. $SNDK +3.76% $SKHY +3.53% $MU +2.95% $WDC +2.81% $STX +1.98%
    also tagged SNDK, SKHY, MU, STX
  • 2026-08-17 04:07Tradexmajorsentiment: neutral
    JUST IN: Memory and storage stocks are climbing premarket: $SNDK +5.6% $WDC +4.4% $SKHY +4.0% $MU +3.5% $STX +3.3%
    also tagged SNDK, SKHY, MU, STX, JUST
  • 2026-08-10 04:18Tradexmajorsentiment: neutral
    AI HARDWARE IS GREEN ACROSS THE BOARD PREMARKET, WITH OPTICS LEADING. Semis: $AMAT +2.26%, $LRCX +2.14%, $INTC +2.06%. Memory: $SNDK +2.12%, $WDC +1.53%, $MU +1.35%. Optics: $AAOI +5.23%, $COHR +4.23%, $LITE +3.56%. Track premarket movers with Aime on AInvest.
    also tagged AMAT, LRCX, INTC, SNDK, MU, AAOI, COHR, LITE, AI
  • 2026-08-07 04:33Tradexmajorsentiment: neutral
    $AAOI SOARS 15.5% AS OPTICAL, MEMORY AND CHIP STOCKS RALLY PREMARKET. $COHR rises 5.1% and $LITE gains 4.9%. Storage names also advance, led by $SNDK and $WDC at roughly 2%, while broader semiconductor gains remain modest. Track premarket movers with Aime on AInvest.
    also tagged AS, COHR, LITE, SNDK, AAOI
  • 2026-08-06 07:57Tradexmajorsentiment: neutral
    Memory stocks are leading a broad premarket semiconductor selloff. $WDC -16.1%, $SNDK -11.1%, $SKHY -7.0%, $MU -5.8%, $STX -5.6%. Chips and optics are also lower: $MRVL -2.1%, $INTC -1.9%, $ARM -1.9%, $AAOI -1.7%, $CRDO -1.5%, $ALAB -1.4%.
    also tagged SNDK, SKHY, MU, STX, MRVL, INTC, ARM, AAOI, CRDO, ALAB
  • 2026-08-05 16:15Tradexmajorsentiment: neutral
    WESTERN DIGITAL POSTED Q4 REVENUE OF $3.75 BLN, ABOVE THE $3.68 BLN ESTIMATE, WITH ADJUSTED EPS OF $3.56 VERSUS $3.31 EXPECTED, EPS OF $8.21, OPERATING INCOME OF $1.56 BLN, NET INCOME OF $3.20 BLN AND A GROSS MARGIN OF 54.1%.

Complete days 2026-07-27 to 2026-09-18; the newest headline in the feed is 2026-09-19 20:10 ET.

core.news_headlines, matched on the feed's own ticker array. A ticker in this feed is a bare symbol, not an identifier: a foreign listing sharing the symbol is tagged the same way, and nothing here can tell the two apart, so headlines are shown exactly as the feed tagged them.

ETF membership

from peers: Ranked against the 16 Core singles XLK held on its 2026-08-12 composition.

Tracked funds holding WDC:

XLK0.99%Technology2026-08-12
QQQ0.64%Technology2026-09-16
SPY0.22%Technology2026-09-16

core.etf_holdings at each fund's newest vendor vintage on or before the as-of date - not this name's newest row, so a fund that dropped it in a later composition drops out here too. Weights are percent; a sum slightly over 100 is cash and rounding.