Expect QE4 But No Economic Boost  If the next big thing from the
Fed works, it may be entirely in our heads.   If QE4 is indeed
on the way, brace yourself for a very small impact. Of all the
Federal Reserve's massive bond-buying programs, this one could
easily have the least effect. And yet there may be good reason
to keep the printing presses going.  Wednesday's Fed statement
comes amid widespread buzz about a fourth round of quantitative
easing, known as QE4. The expectation is for a broadening of
QE3, in which the central bank currently purchases $40 billion
in mortgage-backed securities per month. With the year-end
expiration of Operation Twist, the Fed's program to sell short-
term bonds and buy long-term bonds , some economists now believe
the Fed will decide to purchase an additional $45 billion per
month in securities. Will it work? Maybe, but it will mostly be
in our heads, say analysts.  [Read: One Month Post-QE3, Federal
Reserve Maintains Status Quo]  "I think it would be more of a
psychological eff