pre_text: the table below presents the estimated maximum potential var arising from a one-day loss in fair value for our interest rate , foreign currency , commodity , and equity market-risk-sensitive instruments outstanding as of may 26 , 2019 and may 27 , 2018 , and the average fair value impact during the year ended may 26 , 2019. .
post_text: .
table: Fair Value Impact
table: In Millions May 26, 2019 Averageduringfiscal 2019 May 27, 2018
table: Interest rate instruments $74.4 $46.1 $33.2
table: Foreign currency instruments 16.8 19.0 21.3
table: Commodity instruments 4.1 2.5 1.9
table: Equity instruments 2.3 2.2 2.0
question: Analyse this data from a financial earnings document. what is the change in fair value of foreign currency instruments from 2018 to 2019?