2 adjectives to describe upswing

Swing low sweet upswing.

In part the rising prices since 1897 are explicable as the periodic upswing of confidence and credit, but in the main doubtless they are due to the stimulus of increasing gold supplies.[10] These are but a few of many instances in monetary history, which, taken together, make an argument of probability in favor of the quantity theory so strong as to constitute practically an inductive proof.

2 adjectives to describe  upswing