Harry Dent, best-selling author and economist, has warned that the stock bubble in the U.S. today is the biggest in history and that the “greatest crash of your life is just ahead…”

Writing on his website EconomyandMarkets.com, Dent warned that

The story on Wall Street and CNBC continues to be that we’re in a correction and this is a buying opportunity. Even Warren Buffett joins the chorus of stock market cheerleaders for the skeptical public. Well, I agree with the skeptical public, not the experts here!

The bull market from early 2009 into May 2015 looks just like every bubble in history, and I’m getting one sign after the next that we did indeed peak last May.

I’ve been telling our Boom & Bust subscribers for months now that the dominant pattern in the stock is the “rounded top” pattern I show in the chart below:

SP-500-rounded-top-768x578

After trading in a steep, bubble-like channel from late 2011 into late 2014, with only 10% maximum volatility top to bottom, the market finally lost its momentum… just as the Fed finished tapering its QE. That’s because the Fed was the primary driver in this stock bubble in the first place!

But the first sign that the bubble had indeed peaked was the break of that upward channel last August. Surprise, surprise! Without the Fed’s stimulus, stocks started to sputter out!

With that sign we can point to what now looks like a series of major tops, in one major index after the next, since late 2014.

Dow Transports, November 2014. Dow Utilities, January 2015. The DAX in Germany and the FTSE in the UK: April, 2015. The Dow and S&P 500, May 2015. The Shanghai Composite in June 2015. The Nasdaq, Biotech and the Russell 2000: July 2015. And finally, the Nikkei Index in Japan that peaked in August 2015.

The Shanghai Index crashed 45% in 2.5 months, similar to the Dow in late 1929 on its first 2.5 month wave down. That one was so obvious that when I said it was about to burst, it peaked that day and rolled over the next!

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Dent is a successful newsletter writer and has written numerous best selling books over the years, most recently ‘Spending Waves: The Scientific Key To Predicting Market Behavior for the Next 20 Years’ and ‘The Demographic Cliff – How to Survive and Prosper During the Great Deflation of 2014–2019′ – detailing why we’re facing a “great deflation” after five years of stimulus — and what to do about it now.

With stock market valuations in the U.S. in particular looking stretched and U.S. stocks looking very overvalued, we agree with Dent that there is indeed a real risk of a material correction in stock markets as there was in 2000 and in 2007. In presentations to clients we have looked at and explained why we view these markets as over valued and having all the hallmarks of bubbles about to burst.

Given the risk of a new global financial crisis and the backdrop of a massively leveraged global financial system which has seen debt increase another $57 trillion in just 8 years, it would be foolhardy to dismiss Dent’s bearish prediction. Most economists, brokers, advisers and politicians would be likely to do – as they did regarding warnings we made in the 2005 to 2008 period, prior to the first global financial crisis.

Ultimately, none of us have a crystal ball and it is best to focus on what we control and always follow the three rules of investing: diversification, diversification and diversification.

Portfolios with very overweight allocations to equities and bonds are now at risk and there is a strong case for increasing allocations to cash and gold. Careful consideration should be given to who you deposit your money with and store your gold with. Counter party risk and the return of capital rather than the return on capital will assume importance once again in the coming years.

It is worth pointing out that while Harry Dent believes gold prices will fall initially in the coming deflationary spiral – perhaps as low as $700 per ounce – he clearly advises having an allocation to gold as a form of financial insurance:

“Investors might want to keep a little ‘insurance’ gold for diversification.”

Gold prices may indeed fall in the short term however as was the case in the near financial and economic deflationary collapse in 2008, we believe