upswing

noun

1. an upward swing or swinging movement, as of a pendulum.
2. a marked increase or improvement: an upswing in stock prices.

verb (used without object), up·swung, up·swing·ing.

3. to make or undergo an upswing.

noun (ˈʌpˌswɪŋ)

1. economics a recovery period in the trade cycle
2. an upward swing or movement or any increase or improvement

verb (ʌpˈswɪŋ) -swings, -swinging or -swung

3. (intr) to swing or move up

n.

1922, in golf, from up + swing (n.). Sense in economics is attested from 1934.