WASHINGTON (AP) — This much is clear: The Federal Reserve will make another cut this week in its monthly bond purchases, which have been aimed at keeping long-term loan rates low.

This much is not: When will the Fed start tightening its interest-rate policy to thwart any runaway inflation? How will it do so? And when will the Fed start paring its enormous $4 trillion-plus investment portfolio — a step that will put upward pressure on interest rates?