table of contents totaled an absolute notional equivalent of $ 292.3 million and $ 190.5 million , respectively , with the year-over-year increase primarily driven by earnings growth . at this time , we do not hedge these long-term investment exposures . we do not use foreign exchange contracts for speculative trading purposes , nor do we hedge our foreign currency exposure in a manner that entirely offsets the effects of changes in foreign exchange rates . we regularly review our hedging program and assess the need to utilize financial instruments to hedge currency exposures on an ongoing basis . cash flow hedging 2014hedges of forecasted foreign currency revenue we may use foreign exchange purchased options or forward contracts to hedge foreign currency revenue denominated in euros , british pounds and japanese yen . we hedge these cash flow exposures to reduce the risk that our earnings and cash flows will be adversely affected by changes in exchange rates . these foreign exchange contracts , carried at fair value , may have maturities between one and twelve months . we enter into these foreign exchange contracts to hedge forecasted revenue in the normal course of business and accordingly , they are not speculative in nature . we record changes in the intrinsic value of these cash flow hedges in accumulated other comprehensive income ( loss ) until the forecasted transaction occurs . when the forecasted transaction occurs , we reclassify the related gain or loss on the cash flow hedge to revenue . in the event the underlying forecasted transaction does not occur , or it becomes probable that it will not occur , we reclassify the gain or loss on the related cash flow hedge from accumulated other comprehensive income ( loss ) to interest and other income , net on our consolidated statements of income at that time . for the fiscal year ended november 30 , 2018 , there were no net gains or losses recognized in other income relating to hedges of forecasted transactions that did not occur . balance sheet hedging 2014hedging of foreign currency assets and liabilities we hedge exposures related to our net recognized foreign currency assets and liabilities with foreign exchange forward contracts to reduce the risk that our earnings and cash flows will be adversely affected by changes in foreign currency exchange rates . these foreign exchange contracts are carried at fair value with changes in the fair value recorded as interest and other income , net . these foreign exchange contracts do not subject us to material balance sheet risk due to exchange rate movements because gains and losses on these contracts are intended to offset gains and losses on the assets and liabilities being hedged . at november 30 , 2018 , the outstanding balance sheet hedging derivatives had maturities of 180 days or less . see note 5 of our notes to consolidated financial statements for information regarding our hedging activities . interest rate risk short-term investments and fixed income securities at november 30 , 2018 , we had debt securities classified as short-term investments of $ 1.59 billion . changes in interest rates could adversely affect the market value of these investments . the following table separates these investments , based on stated maturities , to show the approximate exposure to interest rates ( in millions ) : .
what portion of the presented investments is due within 24 months?
a sensitivity analysis was performed on our investment portfolio as of november 30 , 2018 . the analysis is based on an estimate of the hypothetical changes in market value of the portfolio that would result from an immediate parallel shift in the yield curve of various magnitudes. .