The Fed is understandably worried that these bubbles will burst leading to another market meltdown. However, the boom-and-bust cycle will not end because regulators stop investors from taking "excessive" risks. Almost every bubble and economic downturn America has experienced over the past 107 years was caused by the Federal Reserve's manipulation of the money supply.
The Federal Reserve's actions artificially lower interest rates, thus distorting the signals sent by the rates, which are the price of money. Artificially low interest rates cause investments to be made in projects that are not supported by the real underlying market conditions. This results in a boom, inevitably followed by a crash, then by a new round of money creation and government bailouts restarting the cycle.
Increased regulations will not just fail to head off the next crash, they will make the next recession worse. Federal regulators are not capable of determining what is "excessive" risk. Instead, that determination is best left to market participants. Regulators are subject to having the same Fed-induced distorted view of the marketplace as nearly everyone else. Thus, regulators may mistake a growing asset bubble as a thriving sector of the economy that will serve as a long-term source of growth. This is especially the case if, as with the housing bubble, government policies such as the Community Reinvestment Act encourage the malinvestments. Also, regulators may impede the growth of businesses that are actually responding to real economic conditions instead of Fed-created illusions.