As an AI language model, I can provide information based on historical trends, but I cannot provide real-time data or information specific to a particular year. Moreover, stock market data can vary depending on the specific stock exchange and the time period in question. However, I can provide a general perspective on some of the biggest stock market gains and losses over the years.

Here are examples of some notable stock market gains and losses from different years:

Biggest stock market gains:
1. The Dow Jones Industrial Average gained 25.08% in 2013.
2. Munich Stock Exchange gained approximately 31% in 2019.
3. The Hang Seng Index gained nearly 36% in 2017.
4. The NASDAQ Composite gained 85.6% in 1999.
5. The S&P 500 gained 32.39% in 2013.
6. The Nikkei 225 gained 57% in 1972.
7. The Shanghai Composite Index gained 130.4% in 2007.
8. The FTSE 100 gained 22.7% in 2009.
9. The Bovespa Index gained 83.7% in 2016.
10. The Australian Securities Exchange gained 19.89% in 2009.

Biggest stock market losses:
1. The Dow Jones Industrial Average lost 38.33% in 2008.
2. The Shanghai Composite Index lost 65.6% in 2008.
3. The NASDAQ Composite lost 39.29% in 2000.
4. The Nikkei 225 lost 36% in 1990.
5. The Hang Seng Index lost 48.53% in 2008.
6. The FTSE 100 lost 31.8% in 2002.
7. The Bovespa Index lost 32.7% in 2008.
8. The Munich Stock Exchange lost approximately 27% in 2001.
9. The S&P 500 lost 38.49% in 2008.
10. The Australian Securities Exchange lost 42.11% in 2008.

Please note that these examples are not specific to any given year and are for illustrative purposes only. To get accurate and up-to-date information on the biggest stock market gains and losses of a specific year, it is recommended to refer to trusted financial news sources or utilize dedicated financial data platforms.