Les journalistes et les intervenants citent quotidiennement cet indice qui de mon point de vue d'amateur est archaïque et dépassé, ne serait que par son fonctionnement: seulement 30 grosses caps, dont l'effet est pondéré en fonction du prix, et non de la capitalisation.
J'ai posé la question à ChatGPT freeware et à Bard. Les réponses se valent mais Bard est un peu moins neutre sur la fin:
[Bard:]
Overall, the DJIA is a flawed index that should not be used as the sole measure of the stock market. However, it is still a useful tool for investors who want to track the overall health of the market and get a sense of how it is performing relative to its historical levels.
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Dans l'ensemble, le DJIA est un indice défectueux qui ne devrait pas être utilisé comme seule mesure du marché boursier. Cependant, il reste un outil utile pour les investisseurs qui souhaitent suivre la santé globale du marché et avoir une idée de ses performances par rapport à ses niveaux historiques.
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tchat sur GPT :
https://chat.openai.com/share/7f4cd84b-8598-4f4b-8612-ea646193c0a5
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Bard tchat:
There are a few reasons why the Dow Jones Industrial Average (DJIA) is still used as a benchmark, even though it is a relatively outdated index.
* **History:** The DJIA is the oldest stock market index in the world, and it has been around for over 125 years. This makes it a familiar and trusted measure of the stock market, even though there are newer and more accurate indexes available.
* **Simplicity:** The DJIA is calculated by adding up the prices of 30 large-cap stocks and dividing by a divisor. This makes it a very simple index to understand, which is appealing to many investors.
* **Media attention:** The DJIA is widely covered by the media, which gives it a lot of exposure. This can be helpful for investors who want to track the overall health of the stock market.
However, the DJIA has a number of drawbacks that make it a less-than-ideal benchmark.
* **Lack of diversification:** The DJIA only includes 30 stocks, which means that it is not very diversified. This can make it more volatile than other indexes, such as the S&P 500, which includes 500 stocks.
* **Price-weighted:** The DJIA is price-weighted, which means that stocks with higher prices have a greater influence on the index. This can make the DJIA less representative of the overall stock market, as it gives more weight to large, established companies than to smaller, growth companies.
Overall, the DJIA is a flawed index that should not be used as the sole measure of the stock market. However, it is still a useful tool for investors who want to track the overall health of the market and get a sense of how it is performing relative to its historical levels.