ARM — Nasdaq-100 index addition

Arm Holdings (ARM) entered the Nasdaq-100 at the close on Jul 22, 2024, replacing Sirius XM Holdings. The recorded announcement came 10 calendar days before the effective close, on Jul 12, 2024. The company is classified in Information Technology in this dataset.

In the 30 calendar days leading into the effective close, ARM moved -9.7%. The median 30-day run-up among the 14 Nasdaq-100 entries with a recorded announcement and prices for that interval was +12.2%; this stock was 21.9 percentage points below that median. Measured from the effective close, ARM returned 1W: -16.5% versus -2.2% for the 14-entry index median; 1M: -25.3% versus +0.8% for the 14-entry index median; 3M: -5.1% versus +5.6% for the 13-entry index median; 1Y: +4.4% versus +4.4% for the 9-entry index median. These figures do not measure movement from the announcement price.

At 1M, it ranks 14th of 14 measured Nasdaq-100 additions and lagged the benchmark by 25.5 percentage points. At 3M, it ranks 9th of 13 measured Nasdaq-100 additions and lagged the benchmark by 8.7 percentage points. At 1Y, it ranks 5th of 9 measured Nasdaq-100 additions and lagged the benchmark by 14.4 percentage points. The other 8 Information Technology additions with a measured 1M return averaged -2.8%. This is historical context, not a projection.