Samsung·SK hynix·Micron — DRAM & NAND
Semi & AI-infra cycle from customs hard data
AI datacenter backlog vs energized GW — 3D map
NVIDIA rack BOM + 9-layer AI value chain
AI-infra segment CAGRs & chokepoints by layer
Verbatim shortage quotes from earnings calls
Wall Street giants' SEC 13F top positions
US margin debt & Korea credit — leverage gauge