Bluejay Diagnostics (BJDX) shares sank 58% after the company overnight said institutional investors agreed to exercise warrants at a "reduced exercise price."

More than 1.77 million shares traded intraday compared with a daily average of about 1.06 million.

CVRx (CVRX) said late Monday it expects to report roughly $12.3 million in Q1 revenue compared with $10.8 million a year ago.

Analysts polled by FactSet, on average, expected $14.7 million.

Shares sank 44% following an increase in intraday trading volume to over 3.34 million from a daily average of more than 244,000.

Price: 3.17, Change: -4.33, Percent Change: -57.73