After this, the company concentrated its investments into rebuilding the system to double track.

Unlike mutual funds, Powerplay tends to concentrate its investments in a handful of stocks.

They have concentrated their investments in hotels and properties in financial trouble, which has often allowed them to buy at favorable prices.

"We don't have a strategy to concentrate our investments in a small number of companies," he said.

His fund concentrated its investments in domestic Japanese sectors, emphasizing housing, construction and merchandising companies that stood to benefit from efforts to stimulate the economy.

Being nondiversified means the fund can concentrate its investments, thereby increasing risk.

Vestar today is a $7 billion private equity firm concentrating its investments in management buyouts, growth capital, and recapitalisations.

Tukman, which also registered the best gains for the last five years - a 135 percent increase - concentrates its investments in a few high-quality issues.

After this the company concentrated their investments into rebuilding the single track system into double track.

Three of the four have concentrated their investments in so few stocks that their winning picks had a particularly big impact in the quarter.