The 'Tall Latte Index' as is counterpart 'Big Mac Index' is meant to show how currency-exchange rates translate to actual purchasing power. The index shows how many Starbuck lattes (as opposed to Big Macs) U.S. dollars buy in a given country when exchanged for the local currency. USA: $2.80. Switzerland: $4.54 UE: $3.72 Thailand: $1.93 Hong Kong: $3.22