This is when it’ll pop

One of the world’s most influential investors has warned share markets are in the late stages of a massive bubble.

And that it will all end in tears very soon.

GMO co-founder Jeremy Grantham wrote in a letter to investors this week that the very long bull market that started in 2009 has now “matured” into a “fully fledged epic bubble”. 

“Featuring extreme overvaluation, explosive price increases, frenzied issuance, and hysterically speculative investor behavior, I believe this event will be recorded as one of the great bubbles of financial history – right along with the South Sea bubble, 1929, and 2000.”

The S&P/ASX 200 Index (ASX: XJO) and S&P 500 Index (INDEXSP: .INX) have climbed 48% and 68% respectively since…