Wide base index and narrow base index

The first day I officially started to work and do things. I didn't expect the pressure to be so great. When I wrote this blog, I still felt like a stone in my heart. I hope to gradually adapt to this pressure!!

Broad base index

It covers a wide range of stocks and does not limit which industries to invest in. A fairly representative index is the broad base index

A-share broad base index includes CSI 500 Index, SSE 50 Index, CSI 300 Index, GEM Index, etc

SSE 50 Index : Select 50 most representative stocks with large scale and good liquidity in Shanghai Stock Exchange to form sample stocks.

GEM Index : From the GEM listed companies, select the largest and most liquid 100 stocks, the NASDAQ 100 index of A-share.

CSI 300 Index : 300 stocks with the largest scale and best liquidity are selected from Shanghai Stock Exchange and Shenzhen Stock Exchange.

CSI 500 Index : After deducting the sample stocks of the CSI 300 Index and the stocks with the top 300 daily average market capitalization in the last year, the top 500 companies with the top 500 daily average market capitalization are selected as the sample stocks of the CSI 500 Index.

CSI 800 Index : CSI 800 includes CSI 300 and CSI 500, which are the top 800 enterprises in the Shanghai and Shenzhen Stock Exchanges. It can be understood as the medium and large cap stocks in the Shanghai and Shenzhen Stock Exchanges.

CSI 1000 Index : CSI 1000 is the 801st - 1800th enterprise in the head of the Shanghai and Shenzhen Stock Exchanges. It is the 1000 enterprises after removing the top 800 enterprises in the Shanghai and Shenzhen Stock Exchanges, excluding CSI 800. It can be understood as a small cap stock in the Shanghai and Shenzhen Stock Exchanges.

Market type	Exponential style	Representative index	Index definition	Exponential characteristic
Single market wide base	Market	Shanghai Securities 50	50 stocks with the largest market value in Shanghai	High proportion of blue chips and finance
	Small disk	GEM Index	100 GEM with the largest market value	Science, technology and medicine industry has significant characteristics, and some enterprises have large market value
Broad base across markets	Market	CSI 300	Top 300 stocks in A-share market value	The industry composition is relatively balanced
	Middish	CSI 500	500 stocks with A-share market value after 300 in Shanghai and Shenzhen	Cycle+growth characteristics
	Small disk	CSI 1000	1000 stocks with A-share market value after CSI 500	Obvious growth of small stock

Narrow base index

Narrow base index. Compared with broad base index, investment is concentrated on a certain sector or concept, and the risk will be higher

Industry index

Consumption, liquor, medical, banking, securities, military, new energy, science and technology, infrastructure, etc

See China Securities Index Series

China Securities Consumption

Chinese liquor

Chinese medicine

Theme index

The Belt and Road Initiative

SOE reform

Hongmeng concept

Ningde index

Mao Index

To sum up

reference material

1. Wide basis vs narrow basis
2. How to select broad base index
3. Investment Guide for Broad Base Funds
4. What are narrow based index funds - Lin Guibo's blog