Absent of a major external shock, equity markets had their worst periods during recessions.
Yield curves had tended to be a very reliable indicator of recessions, Taylor said.
With a normal yield curve short term interest rates are typically lower than long term rates.
As inflation returnsand a boom takes hold the yield curve starts to move in the other direction, so short term rates rise to match or surpass long term rates.
"The yield curve starts to invert, that's the worrying sign, if you see that then we're almost certainly headed for a recession," Taylor said. "Every recession since World War II has been preceded by an inverted yield curve."
In the US there were now signs that the Federal Reserve as slowing its projected track of rate rises, again.
The failure of Donald Trump to push through any economic stimulus has the market picking one more hike this year instead of three.
"So if that's what the Fed's doing perhaps this cycle can last a little bit longer before the yield curve starts to [invert], he said.
- Market Watch is produced in association with Pie Funds