Using Stock API and Index API to obtain historical index trends is crucial for stock trading. It helps investors grasp market trends, assist in technical analysis to predict stock price movements, evaluate portfolio risks, study industry rotation patterns, and thus formulate reasonable long-term investment strategies. This enables investors to make wiser decisions in stock trading and achieve asset appreciation.

S&P 500 Index Historical Trend

The historical trend of the S&P 500 index shows that it has been on a long-term upward trajectory. From 2010 to 2025, the S&P 500 index has risen by more than 350%, making it one of the best-performing global stock indices.

The long-term upward trend of the S&P 500 also reflects market confidence in its performance, positioning it as a suitable tool for long-term investment. Although the long-term trend of the S&P 500 is clearly upward, there have been periods of decline or sharp drops over the past two decades due to various events and factors.

• From 2000 to 2001, the bursting of the dot-com bubble triggered investor panic and a significant drop in many tech stocks, leading to substantial losses for investors and a severe impact on the U.S. economy. Shortly after, the September 11 terrorist attacks further weakened the U.S. economy and caused panic. The S&P 500 index entered a bear market lasting more than two years under the consecutive impacts of these events.
• In 2008, the U.S. subprime mortgage crisis erupted, originating from bad loans in the subprime market and excessive leverage by financial institutions. This crisis led to a loss of trust in the financial system, causing financial institutions to struggle and creating a massive shock to global financial markets. Both the U.S. and many other countries fell into economic recession, and the S&P 500 index experienced another prolonged period of sharp decline lasting more than two years.
• The most recent event occurred at the beginning of 2020 when the global outbreak of the COVID-19 pandemic restricted economic activities and caused a dramatic plunge in the stock market. The S&P 500 index rapidly fell by nearly 34% in March 2020, setting a record. Subsequently, due to government and central bank interventions and signs of economic recovery, the stock market gradually recovered.

The historical trend of the S&P 500 index shows that these crises had significant impacts, triggering panic selling and stock price declines. However, the S&P 500 index also demonstrated its resilience and ability to recover, often rebounding and reaching new highs in many cases.

How to Obtain Historical Trends via API

API Request Example Code

"""
**iTick**: iTick is a data provider that offers reliable APIs for fintech companies and developers, covering Forex API, Stock API, Cryptocurrency API, Index API, etc., helping to build innovative trading and analytical tools. Currently, they offer a free plan that can meet the basic needs of individual quantitative developers.
Open-source stock data API address:
https://github.com/itick-org
Free API key application address:
https://itick.org
"""

const http = require('https');

const options = {
  method: 'GET',
  hostname: 'api.itick.org',
  port: null,
  path: '/stock/kline?region=us&code=SPX&kType=1',
  headers: {
    accept: 'application/json',
    token: 'your_apikey'
  }
};

const req = http.request(options, function (res) {
  const chunks = [];

  res.on('data', function (chunk) {
    chunks.push(chunk);
  });

  res.on('end', function () {
    const body = Buffer.concat(chunks);
    console.log(body.toString());
  });
});

req.end();