Financial Statement Analysis General Rules
1- Comparison of two Balance Sheet amounts should use the end of the period balances. Thus if both the numerator and denominator are Balance Sheet amounts do not use averages.
2- Comparison of Balance Sheet amount to Income Statement amount should use average balance (Balance Sheet) Rather than a value at a point in time (year-end balance)
3- Amounts being compared should be meaningful (this is done if a plausible Relationship between the amounts exists and the amounts are homogeneous.
Ex: Sales amounts and commissions ⇒ plausible Relationship
COGS ⇔ inventory are both cost based ⇒ homogeneous
Sales ⇔ account receivable both based on sales price ⇒ homogeneous
4- Income Statement is more useful in trend analysis than Balance Sheet, because Income Statement accounts are temporary (nominal) accounts but Balance Sheet balances are real (permanent) accounts.
5- An equal increase in the amounts of numerator and denominator will increase the ratio if numerator is less than denominator and would reduce the ratio if numerator is greater than denominator
6- An equal decrease in the amounts of numerator and denominator will decrease the ratio if numerator is less than denominator and would increase the ratio if numerator is greater than denominator
7- An equal increase or decrease in the % of numerator and denominator will not affect the ratio regardless of whether the numerator amount is greater or lesser than the denominator amount