ARKA-AIF · ANALYTICS
Arka AI Factory Infrastructure
// WEEKLY SNAPSHOT · 2026-06-26 → 2026-07-02 (5 trading days)
The book fell about 11.5% this week, with the semiconductor selloff doing nearly all the damage.
The book lost about 11.5% this week as the semiconductor selloff (SOX down hard on AI-capex overcapacity fears and the Korea chip-deleveraging shock) ran straight through our factor exposure to Semiconductors, which alone subtracted about 9.2%. Market exposure added back roughly 3.2%, but about 21% of the total loss still came from stock-picking rather than our factor bets. Aerospace & Defense barely moved and did not meaningfully offset the semis pain.
Events this week
- 2026-06-29 South Korea unveiled a major AI/semiconductor industrial strategy anchored by Samsung Electronics and SK Hynix; market read-through was mixed as investors weighed strategic support against future memory-supply-glut risk.[1][2][3]
- 2026-06-29 Asia risk tape was choppy after the prior Korea-led chip deleveraging shock; South Korea's KOSPI pared losses to close only slightly lower as the Korea chip plan and U.S.-Iran truce/talks steadied sentiment.[1][2][3]
- 2026-07-01 Meta reportedly began building a cloud business to sell excess AI compute capacity; this intensified AI capex ROI / overcapacity fears and pressured AI infrastructure and neocloud-exposed names.[1][2][3]
- 2026-07-01 Fed Chair Kevin Warsh, speaking at the ECB forum in Sintra, reiterated commitment to the Fed's 2% inflation target, emphasized independence, and pushed back against giving explicit forward guidance.[1][2][3]
- 2026-07-02 U.S. nonfarm payrolls slowed sharply to 57k jobs in June versus roughly 110k expected; this reduced near-term Fed-hike pressure but added to growth-slowdown concerns.[1][2][3]
- 2026-07-02 U.S. semiconductor selloff intensified: the SOX index fell roughly 5.4% for a second straight down day, with weakness across AI and memory-linked names; Nasdaq underperformed even as the Dow closed at a record.[1][2][3]
- 2026-07-02 Fed's Daly said U.S. policy was “slightly restrictive” and the next move remained uncertain; she highlighted both persistent-inflation risk and the risk that AI investment slows if returns remain unclear.[1][2][3]
- 2026-07-02 Korea/Asia chip deleveraging remained a key global signal: reports showed KOSPI down sharply again, with SK Hynix and Samsung Electronics under heavy pressure as leveraged ETF selling and concerns about large new memory investments amplified volatility.[1][2][3]
- 2026-07-03 Reuters Morning Bid framed the macro tape as “soft jobs, hard choices”: weaker payrolls eased dollar/rate pressure, but chip stocks remained under pressure as investors rotated away from AI-heavy exposure.[1][2][3]
- 2026-07-04 U.S. cash equity markets were closed for the Independence Day holiday; no new U.S. market price signal for the weekly snapshot.[1][2][3]
What added and what cost this week
exactThe book fell about 11.5% overall; Semiconductors alone contributed about -9.2%, while Market exposure added about +3.2% and other factors were small by comparison.
Did our tilts predict this?
exactOur factor tilts implied about -9.0% for the week; the book actually fell about -11.5%, so about 21% of the loss came from stock-picking, not factor positioning.
Semis vs. the SOX index
estimateThere weren't enough overlapping trading days this week to compute how closely our Semiconductors exposure moved with the SOX index, so no co-movement read is available.
Did Aerospace & Defense offset the semis selloff?
exactSemiconductors lost about 9.2% for the week while Aerospace & Defense lost only about 0.2%; defense moved opposite to semis on 2 of the 5 days but that was not enough to meaningfully cushion the hit — a short-sample read that may not hold.
WOLF around the semis selloff
estimateWolfspeed (WOLF) fell about 4.7% for the full week and about 2.3% in the days right around the selloff; this is based on only a few trading days and could reverse.
Did stock-by-stock dispersion spike during the selloff?
estimateReturn spread across names on the two selloff days was only about 6% wider than the rest of the week and about 9% wider than the longer-run average — a small, inconclusive difference over so few days.
How to read this
- Stock-picking
- Name-specific stock moves the factor model doesn't explain — i.e. selection, not the book's factor tilts.
- Factor contribution
- How much each factor exposure (e.g. Market, Semis) added to or subtracted from the week's return.
- Predicted vs Actual
- What the book's factor tilts implied for the week vs what it actually returned; the gap is stock-picking.
- Estimate (short-sample)
- A co-movement read over only ~5 trading days — directional, not statistically reliable, and may not hold.
All event-factor links below are correlations observed in a 5-trading-day window; most are not statistically significant and may reverse. Tier-1 figures are exact accounting identities.
Narrative generated by claude-opus-4-8 (effort high) on 2026-07-05T02:06:03Z — all figures machine-verified against this run’s computed results.