May 2015 Monthly Index Performance Report
on 6/1/2015

Market performance in the month of May was driven by concerns about the economy’s health and the uncertainty of when the Fed will start to raise interest rates. In the background, news about the debt crisis in Greece also led media headlines.
The Nasdaq Biotechnology Index was May’s top performer with a 9.2% gain. The Nasdaq OMX Solar Index was the laggard for the month, shedding 8.4%. With its impressive gains, biotechnology continues to be a market leader in 2015. Despite a weak start to the month, the NASDAQ Composite rallied strongly to end the month higher by 2.6%, outperforming the 1.05% gain from the S&P 500. The Nasdaq Composite also crossed back above the key 5,000 level. Other notable strong performers include the Nasdaq PHLX Semiconductor Index (+8.6%), the Nasdaq Q-50 (+5.2%) and the Nasdaq OMX Wind Index (+7.5%).
The Nasdaq Biotechnology Index is May's top performer at 9.2% and the Nasdaq Solar Index is the worst performer of May at -8.4%. Get a quick overview of Nasdaq Index performance data for our top 50 most watched indexes here.