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What: Shares of timeshare company Diamond Resorts International Inc (NYSE: DRII) jumped 30.7% in June, according to data provided by S&P Global Market Intelligence, after getting an offer to be bought out.

So what: Apollo Global Management agreed to buy Diamond Resort for $2.2 billion, or $30.25 per share, in an all-cash deal. The offer brings to an end months of speculation about what the company would do amid potential regulation in the timeshare industry, and a sharp drop in the company's share price.

If you're bullish on shares, it's easy to see this offer as a disappointment. Shares still trade at just 11 times forward earnings estimates, but the market wasn't giving the stock a high price, so management went looking for alternatives from private equity buyers.

Now what: With this offer firmly in hand, investors probably don't have much upside in Diamond Resorts unless Apollo ups its offer before the deal closes. But there's probably more risk in a deal falling through than seeing an increase. I would take some, if not all, of my gains from this offer and move on to other opportunities because a buyout at a big premium is probably the best investors could hope for in 2016.