Eceonomic forecast - recession expected?

How accurate are these economic forecasts?
https://www.wsj.com/graphics/econsurvey/

https://www.cfosurvey.org/press-release/recession-expected-by-late-2020/

Some prominent investors are also signalling that a crash may be coming:

• Warren Buffett's Berkshire Hathaway is predicting a crash and is holding $128.2 billion in cash and seems to be unfazed by the stock market rally and is waiting for a correction to buy good value stocks: 
  https://www.cnbc.com/2019/11/02/warren-buffetts-berkshire-hathaway-reports-a-128-billion-cash-pile.html

• Ray Dalio founder of  world's largest hedge fund Bridgewater has placed a $1.5 billion put options on market crash by March 2020. Ray Dalio believes we are in a period of time similiar to 1937:
• asset prices are near full capacity, we are late in the growth cycle
• interest rates close to zero percent, QE to prop up the economy
• income inequality, wealth gap has widened as wealthy have access to cheap capital
• big gap in politics betwen left and the right with populism is on the rise
• global tensions are rising as a new nation is rising to power

          https://edition.cnn.com/2019/11/21/economy/ray-dalio-economy-great-sag/index.html
          https://www.linkedin.com/pulse/world-has-gone-mad-system-broken-ray-dalio/

• Robert Shiller is Nobel-Prize winning economist and his CAPE (Cyclically Adjusted Price to Earnings Ratio) index suggests a stock market crash is on the horizon. He cautioned that the impressive returns investors have been enjoying over the past few years are likely coming to an end, saying he expects U.S. stocks to return an average of just 4.4% each year over the next 30 years:
  https://www.ccn.com/bubbles-everywhere-suggest-stock-market-crash-coming/

Furthermore when longer term treasury rates are lower than short term treasury rates it is a signal that the market expects a recession. The yield curve has inverted before every US recession since 1975 (see recessions below in grey):

https://research.stlouisfed.org/publications/page1-econ/2019/11/29/should-we-fear-the-inverted-yield-curve

All of the above is all US based and is it relevant for Australia? The Australian market tends to follow the lead of the US market and the US market tends to be the dominant market in the world when it comes to lead-lag relationships. Research suggests there is a strong statistical correlation coefficient between US S&P500 and Australian All Ordinaries, this implies that if US markets crashes it is highly likely that Australian markets will also crash as it has done in the past.

Crash will certainly happen as no bull market runs forever. The hard part is timing it.

What to invest in case of a recession?:

• Cash
• Bonds
• Fixed interest securities
• Dividend Aristocrats
• Short the market (S&P500:-3x SPXU, -2x SDS, -1x SH - ASX200: -1x BEAR) - significant risk, only works short term
• Go long volatility (VXX)
• Lazy all weather portfolio based on Ray Dalio's suggestion
• Gold
• Real estate with good net yield

Long term markets will only go up due to population growth, ever-growing demand, dwindling supply, and inflation.

World’s Major Stock Markets on the Same Scale (1990-2019):
https://www.visualcapitalist.com/worlds-major-stock-markets-same-scale-1990-2019/