There are many ways to do it. One possible way is the Fed statement itself. If tomorrow we get a positive statement from the Fed the equation can change. In fact there are market expectations. Fed can make their policy aligned with the expectations without a large deviation (from expectations). The frequency and amount of deviation can be a function of the health of the economy.
Here's the problem. The Fed has NO CHOICE but to stop the market bleeding, because of its domino effect. This could all spill over into the economy which would really get Fed heads rolling.... worse than that, this could end up being a self-inflicted debt crisis.... the only question is, when is the pain so great they are forced back into the printing presses?
.... this is the infamous black hole that ultimately has swallowed up all banana republics in the past. Once you choose to travel this path, one that many of us were screaming about years ago and were called anti-American for it (figure that one out, huh?) there is NO GOING BACK. This WILL be the final bubble, so it has further up to go... beyond a parabolic, but a final ternary move up.