Length of the report: 4-6 pages.
Introduction – Brief description of the company (Rio Tinto Ltd)力拓集团
Industry overview and Competitive Analysis – Porter’s five forces and SWOT analysis
Financial ratio analysis
Valuation and Recommendation
An appendix showing the assumptions used in the calculation (Risk-free rate, market risk premium, growth rates, etc)
With respect to industry overview and financial ratio analysis, you don’t have to discuss everything. Just briefly talk through some of the important elements.
For valuation and recommendation, mention the approach(es) you have used (DDM, free-cash flow relative valuation, etc) and your recommendation based on a comparison between current price and the value you have arrived at.