Concertgoers, rejoice: An early safety study of Frequency Therapeutics’ hearing loss drug treatment has cleared its first hurdles while showing some signs of hearing improvement in certain patients.

Frequency Electronics Inc. (NASDAQ:FEIM) is one of the hot tech stocks to invest in. On December 16, Freedom Capital downgraded Frequency Electronics to Hold from Buy with a price target of $42, which ...

Figure 4. A snapshot, in time, of two complex numbers whose exponents, and thus their phase angles, change with time. The notion of negative frequency is often troubling to engineers who've spent so ...