Stocks started the week on a positive note Monday in the absence of major economic news. The Dow Jones Industrial Average (DJINDICES:^DJI) and the S&P 500 (SNPINDEX:^GSPC) both rose, and advancing issues on the New York Stock Exchange outnumbered declining ones by more than 2 to 1.

Today's stock market

Index Percentage Change Point Change
Dow 0.25% 65.23
S&P 500 0.37% 10.46

Data source: Yahoo! Finance.

Energy shares led the market as crude oil prices advanced, with the SPDR S&P Oil & Gas Exploration & Production ETF (NYSEMKT:XOP) closing up 2.4%. Communication services lagged; the Communication Services Select SPDR ETF (NYSEMKT:XLC) slipped 0.9%.

As for individual stocks, Fidelity National Information Services (NYSE:FIS) is merging with Worldpay (NYSE:WP), and a safety probe of Boeing (NYSE:BA) intensified.

Display of stock prices with reflection of a city street.

Image source: Getty Images.

FIS buys Worldpay in latest fintech merger

Fidelity National Information Services, also known as FIS, is buying Worldpay in a $33.5 billion cash-and-stock deal. The merger creates a fintech giant by combining Worldpay's payment processing with FIS' business of providing financial services to banks and retailers. Shares of Worldpay rose 10% and those of FIS fell 0.7% on the news.

FIS will pay Worldpay shareholders $11 in cash and 0.9287 FIS shares for each share of Worldpay they own. Including the assumption of Worldpay debt, the combination values the Worldpay enterprise at $43 billion. The companies claim that FIS is the No. 1 global fintech leader and Worldpay is the No. 1 global merchant acquirer. Worldpay itself was created by a merger about a year ago.

The deal echoes the merger of Fiserv and First Data, announced in January and creating another strong competitor in the payments space. Financial companies have been threatened by fintech upstarts like Square and Q2 Holdings, prompting hefty price tags for mergers as the industry consolidates.

Check out the latest earnings call transcripts for Fidelity National Information Services, Worldpay, and Boeing.

Boeing faces criminal investigation

Shares of Boeing fell again, dropping 1.8% after The Wall Street Journal reported that the probe into recent crashes of the 737 MAX 8 has expanded, with federal prosecutors launching a criminal probe into the plane's development and approval processes.

According to WSJ, a grand jury in Washington, D.C., issued a broad subpoena for documents and correspondence related to the development process of the 737 MAX 8. It was sent a day after the tragic crash of an Ethiopian Airlines jet that killed all 157 people aboard. Ordinarily, investigations of aircraft safety issues are handled as a civil matter by the inspector general of the Department of Transportation. The fact that the Justice Department is involved raises even more concerns about the approval process for the company's popular airliner.

The Ethiopian crash is the second one in recent months, following a Lion Air crash in Indonesia in October. Boeing stock recovered after that tragedy but is now down 12% since the latest crash.