Sam Boughedda

Investing.com — U.S. stocks are down Monday, with the  trading approximately half a percent lower. These are the top mMonday, April 18th: idday movers

Casa Systems IncStock of (NASDAQ) has surged 72% after the news that Verizon (NYSE) has given it a multi-year contract to provide 5G Core Network Functions. A 9.9% share of Casa stock will be created by the investment from Verizon, which is approximately $40m.

Natus Medical Incorporated(NASDAQ:) is trading at 29% higher than last week’s closing price after ArchiMed announced that it had entered into an agreement with an affiliate to acquire it for $1.2 billion.

Twitter Inc The shares of the (NYSE) are now up by 4%, after the company’s board adopted the poison-pill strategy. This was to keep Tesla (NASDAQ) CEO Elon Muss from increasing his holding beyond 15%.

Bank of America CorpThe stock market index (NYSE:) gained 3.1% after its report. It reported earnings per share at $0.80 for revenue $23.23 trillion, surpassing analyst expectations.

Charles Schwab CorpAfter missing revenue forecasts, (NYSE:) shares fell 8.6%. On revenue of $4.67 trillion, the financial services firm posted earnings per share (EPS) of $0.77.

Bank of New York Mellon(NYSE;) revenue forecasts, which resulted in the stock trading 2.9% higher midday. Earnings per share were $0.86 for revenue of $3.93billion.