MU Perp Prints $797.90 Overnight, Carrying a $32 Premium Above Cash Into Samsung's Strike Countdown

The Overnight Premium

The 12-hour leg captured the cash session's late-day fade and the overnight bid that came right back to defend it. Cash MU closed Tuesday at $765.77, down roughly 3.7% on the day after Tuesday morning's Korea AI-tax flush dragged the perp to $706.62. On Hyperliquid the print is now $797.90 — back through Monday's $795.33 record close while NYSE is dark. That is roughly a $32, or 4.2%, premium to the last cash trade, an unusually wide funding-adjusted gap for a HIP-3 stock perp and a clean tell that leveraged longs are willing to pay carry into the May 13 cash open rather than wait for confirmation. If spot prints anywhere near where the perp is trading at the open, the basis closes from the cash side, not the perp side.

Strike Math Pulling Forward

The single piece of macro that hasn't been priced out is the timer. Samsung Electronics' largest union reaffirmed an 18-day general strike starting May 21, with government mediation having collapsed and a 93.1% strike approval rate from 61,000 unionized workers across the chip business. TrendForce models the disruption at 3-4% of global DRAM output and 2-3% of NAND, with multi-week recovery risk if it runs the full duration. Samsung's Pyeongtaek fab is the line that carries a meaningful share of HBM supply to global hyperscalers, so a real stoppage doesn't just dent monthly bit output — it forces hyperscaler procurement to re-open allocation conversations for Q3 with the only two suppliers that can actually deliver. Eight calendar days separate the May 13 print from the start of the strike, and the perp is paying for that countdown.

The Pricing Backdrop That Won't Quit

This bid isn't living off vibes. TrendForce's Q2 2026 survey models a 58-63% QoQ rise in conventional DRAM contract prices and a 70-75% jump in NAND contracts, stacked on top of Q1's roughly 90-95% DRAM increase — the largest single-quarter move in the modern memory cycle. Bernstein's Mark Li reiterated his buy on Tuesday and was explicit that the squeeze is concentrated in server DRAM and enterprise SSDs, the exact mix Micron leans into. The company has already pre-sold its entire HBM production through 2026 under binding contracts, so the strike doesn't free up upside for Micron's HBM book — it concentrates it in the spot DRAM and NAND lines where price moves still pass through to the next quarter. That is the math the perp keeps walking back to every time the tape gives it a window.