Risk is the possibility your returns differ from what you expect - including losing money. The main types:
- Market risk - prices fall with the market (equity funds most exposed).
- Credit risk - a bond issuer defaults (debt funds).
- Liquidity risk - holdings are hard to sell (small-cap, low-rated debt).
- Concentration risk - too much in a few stocks or one sector.
A long horizon and diversification are the simplest defences.