The phrase "sharp rally" means that there has been a sudden and significant increase in the value or price of something, usually in a short period of time. Full definition
As seen in the previous graph, emerging markets are noted not only for their steep declines but also for their very sharp rallies. (swanglobalinvestments.com)
* Canadian cannabis producers extended sharp rallies in heavy volume as California opened the largest U.S. state market... (cnbc.com)
The 1982 secular bull market was preceded and followed by secular bear markets that featured lots of sharp rallies and sell offs, but netted investors nothing after more than a decade. (ritholtz.com)