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Post-Close Macro Wrap — March 31, 2026 (Q1 Quarter-End)

March 31, 2026

Q1 Ends With a Bang — But the Regime Hasn't Cleared

Quarter-end arrived with a sharp relief rally: QQQ surged +3.38% to close at $577.25, SPY gained +2.75% to $649.89, and SMH led all three with a +5.73% jump to $383.28. The headline numbers look impressive in isolation. The context is more sobering — all three remain well below their 50-day moving averages, with QQQ -4.48% from SMA50, SPY -4.07%, and SMH -4.00%. Today's move was the kind of violent, oversold bounce that bears market rallies are made of. One strong session does not a regime change make.

What Moved Markets

Semiconductors were the undisputed driver today, and within semis, the memory and networking layers dominated. MRVL led the AI universe with +12.70% to $99.06, followed by SNDK +11.01% ($635.85), ARM +10.54% ($151.57), LITE +7.41% ($702.60), TER +7.17% ($296.42), and KLAC +6.49% ($1,473.09). The breadth within AI infrastructure was impressive — even data center infrastructure (VRT +7.21%, GEV +6.74%) participated. This is a coordinated bid, not isolated stock-specific news.

The lone significant laggard was CEG -8.94% ($271.98), the Constellation Energy nuclear play. CEG also triggered a stop-loss exit after only 3 days held, a reminder that yesterday's macro tailwind (AI power demand → nuclear) can reverse quickly when the narrative shifts. The divergence between CEG and the rest of energy infrastructure (GEV +6.74%) suggests the selling is nuclear-specific, not a sector-wide rotation out of energy.

Layer Rotation Picture

The RS score rankings reinforce today's price action. As of close:

  1. Memory & Storage — avg RS 90.06 (SNDK, WDC, STX, NTAP)
  2. Networking — avg RS 79.56 (LITE, CIEN, CSCO, FFIV)
  3. Semiconductor Equipment — avg RS 49.77 (KLAC, AMAT, TER, and peers)
  4. Data Centers — avg RS 25.57 (VRT, EQIX, DLR, GEV)
  5. Energy Infrastructure — avg RS 24.62 (NEE, WMB, KMI, D, and peers)
  6. Processors — avg RS 11.14 (ARM, and one other)
  7. Foundries — avg RS 10.11
  8. Software & Models — avg RS -6.00

The top of the stack — memory and networking — reflects a market pricing in a resumption of AI infrastructure buildout, not a slowdown. Deepseek's MLA architecture reducing KV cache requirements by 80-90% has been interpreted by some as bearish for memory demand, but today's price action (SNDK +11%, MU-adjacent names surging) suggests the market disagrees. Marvell specifically spans both networking silicon and memory interfaces — its +12.7% move is the single clearest expression of AI infrastructure confidence today.

Exit Storm: No New Setups Forming

The breakout scanner generated eight exits and zero new entries today. WULF, NBIS, COHR, WDC, AMAT, CAMT, STX, and CEG all triggered stop conditions — closing below 50SMA×0.95 or pre-set stop levels. These were predominantly long-held positions (WDC 194 days, STX 208 days, COHR 144 days), suggesting the system has been slow-walking through a correction rather than experiencing a clean flush. The clearing of these legacy positions is actually constructive: when they're gone, the scan can reset and look for fresh setups without the overhang.

Quarter-End Interpretation

Q1 2026 closes in a correction. The index drawdowns from SMA50 (-4 to -6%) are consistent with a market that has experienced meaningful damage — not a catastrophic bear, but a sustained risk-off rotation that has impaired technical structure. Today's quarter-end bounce is partially mechanical (window dressing, rebalancing flows) and partially genuine relief. The question for Q2 is whether the semis leadership can sustain into earnings season and whether macro headwinds (rates, tariff uncertainty) allow indices to reclaim their 50-day averages.

Watch For

  • QQQ reclaiming $580-600 zone: The SMA50 at $604 is the critical hurdle. A sustained push through $590 would signal regime improvement.
  • MRVL and SNDK earnings: These two are the bellwethers for memory/networking sentiment. Any guidance commentary on AI capex from hyperscalers will move the whole layer.
  • Energy infrastructure divergence: CEG's -8.94% vs GEV's +6.74% in the same session warrants monitoring. If nuclear weakness persists into April, it could drag the energy infrastructure RS scores lower.