Newsletter guru Jim Oberweis says the increase in corporate deal-making is a result of the economy improving, and valuations remaining attractive. Oberweis tells Bloomberg that historically, the S&P 500 has traded around an average of 16 or 17 times earnings; currently, he says, it’s trading around 14 times earnings. Oberweis says he wouldn’t be surprised to see a short-term correction in stocks, but he thinks any correction would be short term. He says investors should focus on real estate and equities right now. He thinks U.S. stocks are a safe bet, but he says he’d also look internationally in areas like China.