The Dow Jones only looks at 30 big US corporations and gives more weight to higher prices. This means that a firm with a very high share price has greater power on the index than a company with a lower share price and a bigger market cap. Because of this, it doesn’t fully show how the US economy as a whole is doing (the S&P 500 is a better measure for that).
The Sensex only follows 30 big Indian corporations.Don’t think that these indexes show the whole health of the US or Indian economy.
Risk of Heavy Concentration
There is a lot of concentration in both indices:
- A few stocks in the Dow Jones, such as UnitedHealth, Goldman Sachs, and Microsoft, can have a big effect on the whole index.
- Banking and IT firms make up about half of the Sensex index weight. Even if other sectors are doing well, the Sensex can drop substantially if there is an issue in the financial sector or a global slowdown in IT.
Because of this concentration, just a few corporations can set the direction of these standards.
Very sensitive to events across the world, especially the Dow Jones
News that is peculiar to the US has a big effect on the Dow Jones, such as:
- Decisions over interest rates by the Federal Reserve
- Data on US inflation and jobs
- Tensions between the US and other countries
As Indian markets become more connected to global events, changes in the Dow often affect the opening direction of the Sensex and Nifty the next day. Even if the fundamentals in India are excellent, a significant drop in the Dow can cause people to sell.
Limitations of Using Them as Only Benchmarks
A lot of investors make the mistake of merely comparing the success of their whole portfolio to the Sensex or Dow Jones. This could be misleading because:
- Both of these indices are focused on large-cap stocks.
- For long periods of time, they may do worse or better than mid-cap and small-cap stocks.
- Broader indexes, such the Nifty 500 or S&P 500, give a better snapshot of the market at particular times.
Emotional and Volatile Effects
Both indices can change quickly:
When US economic data or political news comes out, the Dow Jones often reacts sharply.
The Sensex can change a lot when the budget is announced, when there are elections, when the RBI holds policy meetings, or when there are global risk events.
Beginners should be careful not to let their emotions guide their decisions depending on how these indices change from day to day. It’s usual for things to change a lot in a short amount of time, and this doesn’t always mean that the long-term fundamentals are the same.
The Dow Jones and Sensex are great ways to get a feel for how the market is doing, but they have certain problems and hazards. You should be aware of a few crucial things: having a lot of stocks, being affected by happenings across the world, not fully representing the economy as a whole, and the possibility of overreacting emotionally.
