1922, in golf, from up (adv.) + swing (n.). Sense in economics is attested from 1934.
upstanding
upstart
upstate
upstream
upsurge
upswing
upsy-daisy
uptake
uptick
uptight
up-to-date
)window.location='https://www.paypal.com/cgi-bin/webscr?cmd=_donations&business=byronic106@yahoo.com&lc=US&item_name=Donation+to +Help+Keep+Etymonline+Free+and+Open&no_note=0&cn=&curency_code=USD&bn=PP-DonationsBF:btn_donateCC_LG.gif:NonHosted'){kind=link}