OMX Nordic 40

{{Short description|Stock market index}}

{{Infobox Index

| name = OMX Nordic 40

| logo =

| image = OMXN40 index 2002-2024.png

| caption = OMXN40 index performance between 2002 and 2024

| foundation = 2 October 2006

| operator = Nasdaq, Inc.

| exchanges = Nasdaq Stockholm
Nasdaq Copenhagen
Nasdaq Helsinki
Nasdaq Iceland

| constituents = 40

| cap_level = Large cap

| mcap =

| weighting = Capitalization-weighted

| related =

| homepage = [https://indexes.nasdaqomx.com/Index/Overview/OMXN40 Official website]

| isin = SE0001809476

| reuters = .OMXN40

| bloomberg =

}}

The OMX Nordic 40 (OMXN40) is a stock market index for the pan-regional (virtual) Nasdaq Nordic. It is a price return and capitalization-weighted index. The base date for the index is 28 December 2001, with a base value of 1000.{{cite web |title=Overview for OMXN40 |url=https://indexes.nasdaqomx.com/Index/Overview/OMXN40 |website=indexes.nasdaqomx.com |access-date=28 February 2025}}

The OMX Nordic 40 was launched on 2 October 2006{{cite web |title=OMX lanserar index för att underlätta jämförelser i Norden |url=https://news.cision.com/se/omx/r/omx-lanserar-index-for-att-underlatta-jamforelser-i-norden,c229675 |website=news.cision.com |access-date=28 February 2025 |archive-url=https://web.archive.org/web/20191109190439/https://news.cision.com/se/omx/r/omx-lanserar-index-for-att-underlatta-jamforelser-i-norden,c229675 |archive-date=9 November 2019 |language=sv |date=7 September 2006 |url-status=live}}{{cite web |title=Storbolag petas i nytt index |url=https://www.svd.se/a/9d1d244c-3664-3ade-b86e-bae55cf2f12d/storbolag-petas-i-nytt-index |website=svd.se |access-date=28 February 2025 |language=sv}} and consists of the 40 largest and most traded stocks from the four stock exchanges operated by Nasdaq Nordic: Nasdaq Stockholm, Nasdaq Copenhagen, Nasdaq Helsinki and Nasdaq Iceland (although no Icelandic companies are currently included). The free float market capitalization and turnover of the securities are calculated in Euro. The index is reconstituted and rebalanced semi-annually in June and December.{{cite web |title=Index Methodology OMXN40 |url=https://indexes.nasdaqomx.com/docs/Methodology_OMXN40.pdf |website=indexes.nasdaqomx.com |access-date=28 February 2025}}