Grantham: Markets are bubbling, but we’re not at the top yet

“The key point here is that… as long as the Fed is on the side of a strong market there is considerable hope for the bulls. In the Greenspan/ Bernanke/Yellen Era, the Fed historically did not stop its asset price pushing until fully- fledged bubbles had occurred, as they did in U.S. growth stocks in 2000 and in U.S. housing in 2006. Yellen, like both of her predecessors, has bragged about the Fed’s role in pushing up asset prices in order to get a wealth effect. Thus far, she seems to also share their view on feeling no responsibility to interfere with any asset bubble that may form. For me, recognising the power of the Fed to move assets (although desperately limited power to boost the economy), it seems logical to assume that absent a major international economic accident, the current Fed is bound and determined to continue stimulating asset prices until we once again have a fully-fledged bubble. And we are not there yet. We at GMO still believe that bubble territory for the S&P 500 is about 2250.”