Securities maturing in less than 90 days are considered cash regardless of their classification. Therefore they are not included in the Statement of Cash Flows.

OPERATING: Interest and dividends earned on investments. Interest paid for bonds, leases, notes, etc. are considered operating expenses. Dividends paid are a financing activity under GAAP; however under IFRS dividends paid can be in operating or financing.

INVESTING: All purchases and sales of security investments except those maturing in less than 90 days. In addition all purchases and sales of fixed assets involving cash are an investing activity.

FINANCING: All cash inflows and outflows from the Stockholders Equity section of the Balance Sheet go in the financing section in the Statement of Cash Flows (Treasury Stock). Furthermore cash inflows generated from the issuance of bonds and long term notes are a financing activity. Principal payments on notes and leases are financing however under GAAP interests paid on those loans are operating.