Stocks didn't know whether to go up or down on Thursday.

It was an unsettled session in which stocks rallied then tumbled then coasted to close out near session highs. The S&P 500 was up 0.54%, the Dow Jones Industrial Average climbed 0.78%, and the Nasdaq increased 0.86%.

Uncertain trading is symptomatic of how Wall Street has fared so far this week -- a lot of noise while essentially treading water. Since Monday, the Dow has moved in a 340-point range but only fallen 0.2%. 

Volatility could continue as uncertainty remains one of the most prominent unifying threads for global markets. 

"The market doesn't know where and what direction it's headed," Robert Pavlik, chief market strategist at Boston Private Wealth, told TheStreet. All these factors -- China, Europe, the U.S. economic activity, oil, the Federal Reserve and earnings -- have all contributed to the volatility that we've been seeing and of course with the advent of ETFs and internet trading, it makes it that much more susceptible to volatility."

A rally in energy stocks offset a selloff in the health care sector on Thursday. Crude oil jumped on reports Russian Energy Minister Alexander Novak spoke with Saudi Arabian officials to cut production by up to 5% in light of weaker prices. West Texas Intermediate crude oil jumped 2.9% to $33.22 a barrel.

Commodity traders reacted positively to the reports, but any deal has yet to be confirmed. Some remain skeptical the two countries can come to an agreement. 

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"While the potential for a significant bullish stimulus exists in this situation, diplomatic and strategic obstacles -- notably Russia and Saudi Arabia's differing views on the Syrian government and the latter's obstinate dedication to the defense of market share -- will prove major hindrances to cooperation," T. Austin Sapp, commodity analyst at Schneider Electric, wrote in a note.

The energy sector was the best performer as large-cap oilers including Exxon Mobil (XOM) - Get Exxon Mobil Corporation Report , Chevron (CVX) - Get Chevron Corporation Report , Schlumberger (SLB) - Get Schlumberger NV Report , and ConocoPhillips (COP) - Get ConocoPhillips Report jumped. The Energy Select Sector SPDR ETF (XLE) - Get Energy Select Sector SPDR Fund Report rose 3%.

A number of disappointing earnings reports and softer-than-expected guidance from health care stocks including Celgene (CELG) - Get Celgene Corporation Report dragged on the broader sector. Health care was the worst performer on markets Thursday with major drugmakers Pfizer (PFE) - Get Pfizer Inc. Report , Merck (MRK) - Get Merck & Co., Inc. (MRK) Report , Gilead Sciences (GILD) - Get Gilead Sciences, Inc. (GILD) Report and Bristol-Myers Squibb (BMY) - Get Bristol-Myers Squibb Company Report lower. The Health Care SPDR ETF (XLV) - Get Health Care Select Sector SPDR Fund Report tumbled 2.3%.

Facebook (FB) - Get Facebook, Inc. Class A Report led the Nasdaq higher, jumping 15% after reaching $1 billion in quarterly profit for the first time. The social network beat analysts' estimates on its top- and bottom-lines with results driven by increased advertising demand.

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Xerox (XRX) - Get Xerox Holdings Corporation (XRX) Report fell 1% after the bell following reports the company plans to separate its hardware and services businesses into two entities. Activist investor Carl Icahn will reportedly also get three seats on the services company's board, according to The Wall Street Journal. Icahn holds a stake of more than 8% in the printer company.