Where the basket ranks among 30 US sectors right now, how broad the move is, and which names make up the basket.
Showing the after hours, on the 4pm close basis. Updates every few minutes during the session, 4pm close after hours.
One share class per company. The roster is versioned, so every rank ever published for this basket points at a known list of names.
| •••• | -1.10% |
| •••• | -0.54% |
| •••• | -0.43% |
The names behind the moves are for members.
Memory chips and the drives that hold what AI models read and write: DRAM, high bandwidth memory, NAND flash and enterprise storage. The group trades on memory pricing cycles, which turn faster than the rest of the chip world, so it often leads or lags the broader semiconductor tape by weeks.
Every basket is scored on its average move and its breadth against the other 29, every few minutes during the session and again at the 4pm close. The rank is the basket’s place in that list. It comes from the tape itself, not from headlines, so rotation shows up here before it is written about.