using unobservable inputs are an immaterial portion of our portfolio. 

A majority of our available-for-sale securities are priced by pricing vendors and are generally Level 1 or Level 2 investments as these vendors either provide a quoted market price in an active market or use observable inputs without applying significant adjustments in their pricing. Observable inputs include broker quotes, interest rates and yield curves observable at commonly quoted intervals, volatilities and credit risks. Our fair value processes include controls that are designed to ensure appropriate fair values are recorded. These controls include a comparison to another independent pricing vendor. 

Hedge Accounting for Derivatives 

We use derivative contracts to hedge certain anticipated foreign currency and interest rate transactions as well as certain non-functional currency monetary assets and liabilities. When the specific criteria to qualify for hedge accounting has been met, changes in the fair value of contracts hedging probable forecasted future cash flows are recorded in Other comprehensive income, rather than Net income, until the underlying hedged transaction affects Net income. In most cases, this results in gains and losses on hedge derivatives being released from Other comprehensive income into Net income sometime after the maturity of the derivative. One of the criteria for this accounting treatment is that the notional value of these derivative contracts should not be in excess of specifically identified anticipated transactions. By their very nature, our estimates of anticipated transactions may fluctuate over time and may ultimately vary from actual transactions. When anticipated transaction estimates or actual transaction amounts decline below hedged levels, or if it is no longer probable that a forecasted transaction will occur by the end of the originally specified time period or within an additional two-month period of time thereafter, we are required to reclassify the cumulative change in fair value of the over-hedged portion of the related hedge contract from Other comprehensive income to Other (income) expense, net during the quarter in which the decrease occurs. 

We have, in the past, used and may, in the future use, forward contracts or options to hedge our investment in the net assets of certain international subsidiaries to offset foreign currency translation related to our net investment in those subsidiaries. The change in fair value of the forward contracts or options hedging our net investments is reported in the cumulative translation adjustment component of Accumulated other comprehensive income within Total shareholders’ equity, to the extent effective, to offset the foreign currency translation adjustments on those investments. As the value of our underlying net investments in wholly-owned international subsidiaries is known at the time a hedge is placed, the designated hedge is matched to the portion of our net investment at risk. Accordingly, the variability involved in net investment hedges is substantially less than that of other types of hedge transactions and we do not expect any material ineffectiveness. We consider,