Track records,

1- NPT, Revenue, margin, free cash flow

2. Take note of receivables growth, credit growth and ROA, ROCI, esp ROE, = NP/ shareholder equity

calculating capex=

Subtract the change in total liabilities from the change in total assets ($25,000-$10,000). The answer, $15,000, represents the amount spent on capital (capital expenditures) for the year.

or investment at PPE

Read more: How to Calculate Capital Expenditure | eHow.com http://www.ehow.com/how_5094718_calculate-capital-expenditure.html#ixzz27xxQ08gp

Take note of deprecation rate, if NAV is the main reason of buying.

Take note of other notes of income, it will most probably contain 1-off items that you mislead you.