What happened

Shares of global agribusiness leader Bunge Ltd (BG -0.52%) jumped as much as 17.6% Tuesday in a mid-afternoon spike after The Wall Street Journal reported that Glencore PLC approached the company about a takeover. At 2:45 p.m. EDT shares are still up 16% and showing no signs of giving up the day's gains.

So what

Reports of Glencore's approach of Bunge are speculation and The Wall Street Journal noted that there may not be a deal between the two companies. But the news was enough to lead to the afternoon's stock pop and we'll likely hear in coming hours or days from management concerning whether talks are underway.

Tractor in a field shown from overhead.

Image source: Getty Images.

Even if reports are true, what is unknown is the amount Glencore may want to pay for Bunge. The company has seen revenue fall the last couple of years and it recently reduced guidance -- this isn't a buyout that would take place from a point of strength by Bunge.

Now what

Buying a stock on speculation of a buyout can be risky because investors have no idea if a buyout will take place, or at what price. But given the pop in shares to near a 52-week high, this could be a nice point to take some gains off the table for investors. If the buyout speculation proves false or the deal falls through, shares will likely drop to where they were on Monday. And with the unknown of what kind of premium Glencore would pay for the company, it's worth taking a cautious approach to Tuesday's pop.