I believe that the global economy is setting up for a new golden age reminiscent of the one the United States enjoyed during the 1950s, and which I still remember fondly.

This is not some pie in the sky prediction. It simply assumes a continuation of existing trends in demographics, technology, politics, and economics. The implications for your investment portfolio will be huge.

What I call "intergenerational arbitrage" will be the principal impetus. The main reason that we are now enduring two "lost decades" of economic growth is that 80 million baby boomers are retiring to be followed by only 65 million "Gen Xers."

When the majority of the population is in retirement mode, it means that there are fewer buyers of real estate, home appliances, and "RISK ON" assets such as equities, and more buyers of assisted living facilities, health care, and "RISK OFF" assets such as bonds.

The net result of this is slower economic growth, higher budget deficits, a weak currency, and registered investment advisors who have distilled their practices down to only municipal bond sales.

Fast forward six years when the reverse happens and the baby boomers are out of the economy, worried about whether their diapers get changed on time or if their favorite flavor of Ensure is in stock at the nursing home.

That is when you have 65 million Gen Xers being chased by 85 million of the "millennial" generation trying to buy their assets.

By then we will not have built new homes in appreciable numbers for 20 years and a severe scarcity of housing hits. Residential real estate prices will soar. Labor shortages will force wage hikes.

The middle-class standard of living will reverse a then 40-year decline. Annual GDP growth will return from the current subdued 2% rate to near the torrid 4% seen during the 1990s.

The stock market rockets in this scenario. Share prices may rise very gradually for the rest of the teens as long as tepid 2% growth persists. A 5% annual gain takes the Dow to 28,000 by 2019.

After that, after a brief dip, we could see the same fourfold return we saw during the Clinton administration, taking the Dow to 100,000 by 2030. If I'm wrong, it will hit 200,000 instead.

Emerging stock markets (EEM) with much higher growth rates do far better.

This is not just a demographic story. The next 20 years should bring a fundamental restructuring of our energy infrastructure as well.

The 100-year supply of natural gas (UNG) we have recently discovered through the new "fracking" technology will finally make it to end users, replacing coal (KOL) and oil (USO). Fracking applied to oilfields is also unlocking vast new supplies.

Since 1995, the United States Geological Survey estimate of recoverable reserves has ballooned from 150 million barrels to 8 billion. OPEC's share of global reserves is collapsing.

This is all happening while automobile efficiencies are rapidly improving and the use of public transportation soars.

Mileage for the average U.S. car has jumped from 23 to 24.7 miles per gallon in the past couple of years, and the administration is targeting 50 mpg by 2025. Total gasoline consumption is now at a five-year low.

Alternative energy technologies will also contribute in an important way in states such as California, accounting for 30% of total electric power generation by 2020, and 50% by 2030.

I now have an all-electric garage, with a Nissan Leaf (NSANY) for local errands and a Tesla Model S-1 (TSLA) for longer trips, allowing me to disappear from the gasoline market completely. Millions will follow. The net result of all of this is lower energy prices for everyone.

It will also flip the U.S. from a net importer to an exporter of energy, with hugely positive implications for America's balance of payments. Eliminating our largest import and adding an important export is very dollar bullish for the long term.

That sets up a multiyear short for the world's big energy consuming currencies, especially the Japanese yen (FXY) and the Euro (FXE). A strong greenback further reinforces the bull case for stocks.

Accelerating technology will bring another continuing positive. Of course, it's great to have new toys to play with on the weekends, send out Facebook photos to the family, and edit your own home videos.

But at the enterprise level this is enabling speedy improvements in productivity that are filtering down to every business in the U.S., lowering costs everywhere.

This is why corporate earnings have been outperforming the economy as a whole by a large margin.

Profit margins are at an all-time high. Living near booming Silicon Valley, I can tell you that there are thousands of new technologies and business models that you have never heard of under development.

When the winners emerge, they will have a big cross-leveraged effect on economy.

New health care breakthroughs will make serious disease a thing of the past, which are also being spearheaded in the San Francisco Bay area.

This is because the Golden State thumbed its nose at the federal government 10 years ago when the stem cell research ban was implemented. It raised $3 billion through a bond issue to fund its own research, even though it couldn't afford it.

I tell my kids they will never be afflicted by my maladies. When they get cancer in 20 years they will just go down to Wal-Mart and buy a bottle of cancer pills for $5, and it will be gone by Friday.

What is this worth to the global economy? Oh, about $2 trillion a year, or 4% of GDP. Who is overwhelmingly in the driver's seat on these innovations? The USA.

There is a political element to the new golden age as well. Gridlock in Washington can't last forever. Eventually, one side or another will prevail with a clear majority.

This will allow the government to push through needed long-term structural reforms, the solution of which everyone agrees on now, but for which nobody wants to be blamed.

That means raising the retirement age from 66 to 70 where it belongs and means-testing recipients. Billionaires don't need the maximum $30,156 annual supplement. Nor do I.

The ending of our foreign wars and the elimination of extravagant unneeded weapons systems cuts defense spending from $800 billion a year to $400 billion, or back to the 2000, pre-9/11 level. Guess what happens when we cut defense spending? So does everyone else.

I can tell you from personal experience that staying friendly with someone is far cheaper than blowing them up.

A Pax Americana would ensue.

That means China will have to defend its own oil supply, instead of relying on us to do it for them. That's why they have recently bought a second used aircraft carrier. The Middle East is now their headache.

The national debt then comes under control, and we don't end up like Greece.

The long-awaited Treasury bond (TLT) crash never happens. The Fed has already told us as much by indicating that the Federal Reserve will only raise interest rates at an infinitesimally slow rate of 25 basis points a quarter.

Sure, this is all very long-term, over-the-horizon stuff. You can expect the financial markets to start discounting a few years hence, even though the main drivers won't kick in for another decade.

But some individual industries and companies will start to discount this rosy scenario now.

Perhaps this is what the nonstop rally in stocks since 2009 has been trying to tell us.

Dow Average 1908-2018

Another American Golden Age is Coming