The stocksheet is diveded into two segments by the algorithm. Each segment consists of strips with the same length and the direction. Rectangular blanks of different sizes appear in one strip.
The other thing to remember is that the Fed takes a "stock" approach to easing, which means it is the size of the balance sheet rather than the pace of purchases that matters.
另外，美联储采取“股法”手段来达到复苏的目的，这意味着关键的问题是资产负债的规模，而不是采购速度。
3
The stock of debt that banks and households still carry will take years to pay off. The hole in the balance-sheet must be sealed before the economy can regain its bounce.