WDC Flow Report

Analysis based on market close March 31, 2026

Flow Verdict

Confidence:

7.5 / 10

base 5; +2 strong bullish net premium & call flow; +1 flow aligns with trending GEX regime; -0.5 high IV (87%) suggests elevated risk; -0.5 spot below near-term max pain

Watch next session: Flow in $290C and $320C (4/2) for continuation; Any defensive put buying at $265 or below; Spot reaction near $280 max pain level

Flow Summary

Net premium: +$51.2M bullish

P/C volume ratio: 0.65 — strongly call-dominant

P/C OI ratio: 1.16 — moderate put lean in positioning

Aggressive, short-dated call buying is driving a strongly bullish flow regime, with over $51M in net premium paid for calls. This contrasts with the open interest, which shows a slight put lean, suggesting today's flow represents a significant new directional bet or a rapid repositioning.

Notable Prints

WDC 4/2 $320 Call

Vol: 5,827

OI: 666

Vol/OI: 8.8x

IV: 63.2%

Notional: ~$9.3M (est. mid ~$1.60)

Intent: Fresh, aggressive directional call buying

Dual read: Bought to open (bullish bet on >18% move in 2 days) or part of a complex spread (e.g., call diagonal).

Read-through: This is the dominant flow signal: a massive, high-conviction bet on an explosive move higher by Friday. The 63% IV is high but below the term structure, suggesting it was bought, not sold.

WDC 4/10 $290 Call

Vol: 1,164

OI: 162

Vol/OI: 7.2x

IV: 76.1%

Notional: ~$1.75M (est. mid ~$1.50)

Intent: Directional call buying for next week

Dual read: Bought to open (bullish) or sold (covered call).

Read-through: Follows the bullish theme but with more time (10 days). Targets a ~7% move. Consistent with the broader call-buying narrative, adding duration to the bullish exposure.

WDC 4/2 $300 Put

Vol: 1,234

OI: 278

Vol/OI: 4.4x

IV: 68.5%

Notional: ~$740K (est. mid ~$0.60)

Intent: Hedge or speculative put buy

Dual read: Bought as a hedge against a long position (defensive) or sold for premium (neutral/bullish).

Read-through: Given the overwhelmingly bullish call flow, this is likely a hedge. The $300 strike is 11% above spot, suggesting it's not a near-term directional bet but protection against a reversal. Its size is dwarfed by the call purchases.

WDC 5/15 $390 Call

Vol: 468

OI: 143

Vol/OI: 3.3x

IV: 83.0%

Notional: ~$655K (est. mid ~$1.40)

Intent: Long-dated, high-upside call buying

Dual read: Bought for leveraged upside over 6 weeks.

Read-through: A bet on a sustained rally (>44% move) into mid-May, potentially around earnings (5/6). Adds to the bullish, high-conviction theme but with a longer timeframe.

WDC 4/2 $315 Call

Vol: 1,423

OI: 458

Vol/OI: 3.1x

IV: 65.5%

Notional: ~$1.14M (est. mid ~$0.80)

Intent: Directional call buying

Dual read: Bought as a follow-on to the $320C trade, targeting a slightly lower hurdle (~16.5% move).

Read-through: Part of the concentrated bullish activity in the 4/2 expiration, clustering around the $310-$320 strikes. Reinforces the short-term explosive move thesis.

Institutional Positioning

Call additions: Heavy additions in 4/2 $310-$320C and 4/10 $290C. Longer-dated buying in 5/15 $390C.

Put additions: Minor defensive activity in 4/2 $300P and $285P. Far OTM puts ($90, $55) dominate OI but show no new flow.

GEX/DEX consistency: Yes — Negative GEX (-$285K) in a 'Trending' regime is pro-cyclical, meaning dealers are short gamma and will amplify spot moves. This aligns perfectly with the aggressive bullish flow seeking a breakout.

OI clusters: Major OI clusters are far OTM: $90P (19K OI), $55P (10K OI), $360C (6K OI), $350C (6K OI). These are likely legacy positions, not reflective of today's flow. Near-term, the $280-$290 area shows concentration from max pain.

Hedging evidence: Limited. The $300P and $285P buys are small relative to call flows. The massive far OTM put OI ($90, $55) could be part of tail-risk hedges or financed structures from months ago.

Max pain context: Spot ($270.49) is below the nearest max pain ($280 for 3/27, $272.50 for 4/2). The falling MP trend suggests gravity is pulling lower, but today's aggressive call flow is betting against that gravity for a sharp move higher.

Signal vs Noise

~The massive net premium from $40, $80, $110 calls is almost certainly noise — likely the result of a large, multi-leg institutional trade (e.g., a collar roll, diagonal) where deep OTM calls were sold for financing. The volume/OI on those strikes is negligible.

~High OI in $90P and $55P is structural (likely old hedges or financed positions), not a signal of new bearish intent given zero flow.

~Some of the 4/2 put flow ($265P, $285P, $290P) could be closing of existing hedges (profit-taking on recent down move) rather than new bearish bets.

Key Conclusions

🚀Explosive bullish bet in play: Over $51M net premium paid, concentrated in short-dated, OTM calls targeting moves to $290-$320.

⚙️Dealer positioning (negative GEX) will fuel any breakout, amplifying the move if calls start going in-the-money.

⚖️High IV (87%) and spot below max pain create headwinds; flow is betting against these technical resistances.

🎯Watch $280 (max pain) and $290 (key call strike). A break above confirms the flow thesis; failure suggests a pin at max pain.

Read the Flow analysis for WDC for 2026-03-31. This AI-generated report covers regime classification, key price levels, strategy recommendations, and actionable trade ideas drawn from end-of-day options data including gamma exposure, delta exposure, and implied volatility.