The Stock Market Is Repeating a Pattern Last Seen Decades Ago -- Here's What History Says Happens Next

In any given market environment, investors can usually point to a small subset of stocks that account for nearly all of the gains in major indexes such as the S&P 500 (SNPINDEX: ^GSPC) and the Nasdaq Composite (NASDAQINDEX: ^IXIC). A study published this year found that just 46 of more than 29,000 publicly traded companies accounted for half of the stock market's wealth creation over the last 100 years. Meanwhile, the median return of the entire stock universe, which generated an aggregate total return of 30,000%, was negative 6.9%. Missed Nvidia in 2009? This Rare Signal Is Flashing Again. In 2009, a "Double Down" signal flashed for a little-known chipmaker called Nvidia.