Focus on the pronunciation of tumble
English definition of “tumble”
/ˈtʌmbl/ verb [I] STOCK MARKET
› to go down in amount or value very quickly and suddenly: tumble to sth (from sth) Its stock has tumbled to $1.62 a share from a high of $14 last week. tumble 20%/20 points/20 cents December crude oil tumbled 51 cents to $24.34 a barrel. Stock and bond prices tumbled sharply.