The London-based IPE is Europe's leading energy futures and options exchange. If you hold oil stocks or are thinking of investing in the energy sector, be sure to check in with OPEC's site. Stay on top of the latest news and announcements from OPEC member countries, and access price changes and daily dispatches from OPEC's news agency. The Financial Times offers energy sector reports and publications that can be downloaded directly to your desktop. Newsletters and reports cover the oil markets.
Regional analyses are also available.
If you are planning on investing purely in oil stocks, it's important to know the risks and advantages involved in sector funds. Vanguard investment services offers a good introduction to this type of investing here.