wont lose money bro,go pick up a book and read,theres hundreds of books written about the snp 500 and other indices already,try reading four pillars of investing by william bernstein.....tons and tons of data and prices backtested as far back as the 1920s......nearly 100 years since the stock market history.
u want i make a bet with you for $1000 on the snp 500,twenty years from now from 2015 to 2035,if the snp500 is lower than today,ill pay u $1000.u want bet how much also can $5000,$10,000.i dont mind collecting on a suckers bet......going as far back as 1950s,economists and statisticians has discovered snp 500 has never had a losing 20 year period anywhere between 1950 to 2015.there were periods of low returns going as low as 3 or 4 percent annualised,but over the next 10 or 15 years the snp experienced a reversion to the mean performing extremely well achieving returns as high as 18 percent annualised.on average the return of the snp 500 since 1928 is about 9.8 percent.