The beginning of the New Year is a customary time to speculate on the year ahead.

With RBS credit chief urging investors to “sell everything except high quality bonds” the first two weeks of 2016 has witnessed the worst start to a year for global equity returns in at least 45 years, raising fears of a global ‘sell-off’.

So should we take this seriously and get out of the market…?

To be honest, I stopped paying attention to economic forecasts a long time ago. The ignominy that goes with making bold forecasts was highlighted in a recent newspaper article, which listed many bad calls US economists had made about 2015. These included getting the timing of the Federal Reserve’s interest rate increase wrong, incorrectly calling for a rise in long-term bond yields and assuming an end to the commodity rout¹.

For the broad US equity market, 22 strategists polled by the Wall Street Journal² estimated an average increase for the S&P 500 of 8.2% for 2015. The most optimistic individual forecast was for a rise of 14%. The least optimistic was 2%. No-one picked a fall. As it turned out, the benchmark ended marginally lower for the year.

In the UK, a poll of 49 fund managers, traders and strategists published in early January 2015 forecast the FTSE 100 index would be at 6,800 by mid-year and 7,000 points by year-end. As it turned out, the FTSE surpassed that year-end target by late April to hit a record high of 7,103, before retracing to 6,242 by year-end³.

It shouldn’t be a surprise that if economists can’t get the broad variables right, it must be tough for stock analysts to pick winners. Even a stock like Apple, which for so many years surprised on the upside, disappointed some forecasters last year with a 4.6% decline⁴.

It should be evident by now that setting your investment course based on someone’s stock picks or expectations for interest rates, the economy or currencies is not a viable way of building wealth in the long term. Markets have a way of confounding your expectations. So the better option is stay broadly diversified and, with the help of an adviser, set an asset allocation that matches your own risk appetite, goals and circumstances.

Of course, this doesn’t stop you or anyone else having or expressing an opinion about the future. We are all free to speculate about what might happen in the economy and markets. The danger is when you base your investment strategy on an opinion.

In the meantime, if you insist on setting store by forecasts, here is a list of ten predictions you can count on coming true in 2016:

1. Markets will go up some of the time and down some of the time.
2. There will be unexpected news. Some of this will move prices.
3. Acres of newsprint will be devoted to the likely path of interest rates.
4. Acres more will speculate on China’s growth outlook.
5. TV pundits will frequently and loudly debate short-term market direction.
6. Some economies will strengthen. Others will weaken. These change year to year.
7. Some companies will prosper. Others will falter. These change year to year.
8. Parts of your portfolio will do better than other parts. We don’t know which.
9. A new book will say the rules no longer work and everything has changed.
10. Another new book will say nothing has really changed and the old rules still apply.

You can see from that list that if forecasts are so hard to get right, you are better off keeping them as generic as possible. Like a weather forecaster predicting wind, hail, heat and cold over a single day, your audience will prepare themselves for all climates.

The future is always uncertain. There are always unexpected events. Some will turn out worse than you expect; others will turn out better. The only sustainable approach to that uncertainty is to focus on what you can control.

In the meantime, let me wish a happy New Year to you all.

1. Malcolm Maiden, “The Year Market Economists Failed to See Coming,” SMH, 30 December 2015
2. “Strategists Expect Stocks to Keep Climbing in 2015,” WSJ, 2 January 2015
3. “Five Fund Strategies to Ride Rising Markets,” The Times, 3 January 2015
4. “Seven Stocks to Buy for 2015,” CNN Money, 31 December 2014