The LongFin error illustrates why small companies aren't allowed in big stock indexes.
News & Analysis: RUSSELL 2000 STOCK INDEX
Investors fear the end of the bull market, but there's a key reason not to panic.
New records in a long-lagging stock market could point to better gains ahead.
The stock market has fallen recently, but compared to history, there's plenty of room for a much more painful plunge.
After falling by 10%, the Nasdaq seems to be warning of more pain ahead
Even though the Dow rose, troubling trends elsewhere hurt the broader market.
Looking beyond the Dow is important to get perspective on the market as a whole.
The Dow Jones Industrials have stable membership, but other indexes have regular turnover. Find out how changes to Russell indexes could affect you.
Even as the market eased down today, the small-cap arena has seen a lot more volatility.
Mid-cap stocks have held up reasonably well, proving their Goldilocks-like status once again.