Of course, there is always talk about how to make money from the Baby Boomers in the US.

As for Goldman Sachs (NYSE:GS), it thinks another big opportunity is in the aging population in Japan. According to a story in the Financial Times, Goldman has actually set up a new investment to take advantage of the mega trend. It's a warrant that is based on the performance of 11 companies (it's called the Baby Boomer Basket E-Warrant).

The basket of companies are in industries such as fitness, hobbies, travel and even toilet makers (because retired people are likely to spend more time at home).

There could be a sudden boost. The reason: the typical Japanese pension pays out in a lump-sum, not as an ongoing annuity.

Oh, and yes, Goldman also has some banks in its warrant.

Tom Taulli is the author of various books, including the Complete M&A Handbook and the EDGAR-Online Guide to Decoding Financial Statements.