NEW YORK — You may be unfamiliar with some of the best stocks on Wall Street this year.
Small, mostly unknown names are leading the surge in stock markets. Companies like Entravision Communications, a Spanish-language media company; SunPower, a maker of solar panels, and MannKind, a biopharmaceutical company, have more than tripled in value. All are part of the Russell 2000, an index of small-company stocks that has outperformed other major indexes in 2013.
The Russell 2000, as its name implies, includes about 2,000 companies with a market value ranging from $129 million to $3.3 billion. The index broke through 1,000 for the first time on July 5 and closed Friday at 1,048. It has jumped 23 percent this year. That's better than the Standard & Poor's 500 index, which is up 19 percent, and the Dow Jones industrial average, which has gained 18 percent.
The Russell's performance is even more impressive over the past 4-1/2 years. The index is up 205 percent since a bull market in stocks began in March 2009; the S&P 500 is up 150 percent.
That suggests investors are slightly more comfortable buying stocks of smaller, riskier companies, than they are holding shares of big, multinational companies, like Exxon Mobil and Apple.
The S&P 600, another index that tracks small-company stocks, is also reflecting the popularity of small caps. That index is up 24 percent this year.
Investors have poured a net $18.2 billion into small-company mutual funds this year, according to Lipper, a company that tracks funds. If that trend continues, the sector could have its best year since 2004, when investors put a net $20.8 billion into small-company funds.
Here are the factors behind the rise in small-company stocks.