Less plentiful credit means less economic activity.

ECONOMIST: America goes bust

Moreover, if people want to borrow to buy shares, raising margin requirements would probably send them to the plentiful other sources of credit.

ECONOMIST: Marginal differences

Volatility is low, credit still plentiful.

ECONOMIST: American investment banks: Streets ahead of the rest | The

Credit spreads remain very narrow, which may indicate a focus on near-term growth and plentiful liquidity.

FORBES: More Malpass: Watch for 2007 Slowdown

As evidenced by the clamoring among small businesses for more credit, it becomes apparent that the Fed has played a certain role in making what might be plentiful if market forces were allowed to prevail, dear.

FORBES: The Fed's "Loose" Money Stance Is Making Credit Tight

Visa's IPO will give it access to money to plough into Asia and Latin America, regions that have not taken to credit cards as enthusiastically as Americans or the British but where business is growing and opportunities for expansion are plentiful.

ECONOMIST: Visa plans a $19 billion IPO