After a month beset by uncertainty in the Eurozone (see Neon Tommy's comprehensive coverage), the dud Facebook IPO and JP Morgan's massive derivatives losses, major markets dropped again today to conclude Wall Street's worst month since last September. As Reuters reports:

"The broad S&P 500 index fell 6.3 percent in May, its largest percentage drop since September. The Dow's 6.2 percent drop and Nasdaq's 7.2 percent loss are their largest monthly declines in two years."

President Obama has been touting the recovery in his reelection contest against Mitt Romney and can hardly afford an economic slowdown headed into the summer, even if it is mainly due to events outside of his control. As the Huffington Post reports, Romney today visited the shuttered headquarters of solar energy company Solyndra, a high-profile failure by the Obama economic team.

Tomorrow looks to be a big day across world markets, as a wide array of economic reports will be released. Much of the attention here, and particularly that of President Obama and his challenger, Mitt Romney, will be focused on the U.S. jobs report. Business Insider has a fuller list of other information that will be released overnight and into tomorrow.

Reach Executive Producer Matt Pressberg here.