A mutual fund (called 'unit trust' in Asia) is an investment vehicle that pools money from many individual investors. A professional fund manager invests and manages these funds into stocks, bonds and other securities.

Sector funds have their place in your portfolio, not as core holdings, but as a diversified way of making targeted investments in selected niches.

The key to building a strong investment portfolio is to set your goals and diversify but not have so many investments you cant follow and to avoid investments which are too small to be meaningful.

Many mutual fund screening tools have portfolio turnover as one of their filters and you can usually find a fund's turnover (expressed as a percentage) on the fund's snapshot page or by doing a little digging on the fund's website.

ETF trend and investment information.

Mutual fund review, S&P and related earnings.