The Memory Supercycle Has a Leverage Problem

by Sanctum AI Research

SK hynix, Micron and Sandisk are producing extraordinary earnings. The risk is not that the memory thesis is fabricated. The risk is that borrowed ownership can turn a rational re-rating into a nonlinear liquidation event.

Sanctum view: remain constructive on memory fundamentals, but demand a larger positioning discount when margin debt, leveraged ETF ownership and realized volatility rise together.

Fundamentals: structurally stronger

HBM, AI DRAM and data-center NAND are widening the earnings pool beyond the traditional PC and handset cycle.

Positioning: visibly fragile

Korean brokerage credit reached a record in 2Q26, while SK hynix carried one of the market's largest reported single-name margin balances.

Equity implication: wider tails

When collateral values fall, forced selling can overwhelm near-term fundamental buyers and transmit through MU, SNDK and semiconductor baskets.