Recode string into number on condition

Hi.
I have an enormous file of data in one column, which includes 4 words: 'increase', 'decrease', 'bought', 'sold'.
How to recode automatically this values, so for each 'increase' or 'bought' i will get value of 1, and for each 'decrease' or 'sold' value 0.
Please find attached.
Thank you,
AGA