Morningstar and Vanguard both have reputable stock index trackers for weekly, monthly and yearly returns, according to both of the company websites. Charts show stock market indices down the left side of the Web pages, and columns show percentages of returns over a certain time frame, as of 2015.
Column headings on Morningstar.com shows percentage returns for one week, year to date, four weeks, 13 weeks and then one year, notes the website. The other two columns show three- and five-year return rates for major indices, broad markets and special stock products. Vanguard has a similar setup, except this website uses returns for one and three months before turning to one-, three-, five- and 10-year returns, notes Vanguard.com.