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Former US Federal Reserve Chairman Alan Greenspan said on the 31st that the US economy is hard to avoid falling into recession, and the fall in US housing prices is far from bottom.
Greenspan said in an interview with CNBC on the same day that the current data indicates that the US economy has not yet declined, but it is on the verge of recession. As the unemployment rate rises and the global economy slows, the US economy will have a hard time avoiding a recession.
Greenspan pointed out that the government did have no choice when it came to rescue Bear Stearns and two major mortgage financing institutions, Fannie Mae and Freddie Mac, but he thought that the Fed, as the central bank, should not be involved because it is The operation of a fiscal policy should be the responsibility of the Ministry of Finance.
He also warned that there are still big problems with Fannie Mae and Freddie Mac. He believes that the final solution is to nationalize and structurally adjust the two institutions, then divide them into several independent entities and sell them separately to make them return to the market.
Greenspan also said that although the current priority is to stabilize financial markets, he is still worried about the long-term problem of inflation. He said, "We will survive this financial crisis, but we will have to face the problem of how to maintain a balance between economic growth and inflation."
Greenspan served as chairman of the Federal Reserve from 1987 to 2006. Some critics believe that the real estate bubble in the United States in the past few years has a lot to do with the low interest rate policy during his tenure. 
Why don't ferrite magnets rust?
The chemical name of ferrite magnet is iron tetroxide. The main components are: Fe3O4. It is already an oxide of iron, so it is very difficult to be oxidized again. Other magnets (the main component is iron) are made of magnetized metal iron or other elements. Like other iron and steel, they can be oxidized and rusted, and the oxidized part will lose their magnetism.
What are the advantages (advantages) of ferrite magnets
1. Low cost, low price. Raw material cost is cheap.
2. Good temperature stability. It can be used in temperatures of -40 degrees Celsius and +350 degrees Celsius.
3. It is just mentioned that it does not rust.
4. The demagnetization curve is approximately a straight line.
5. Light weight, density is (4.6-5.1) X103kg/M3
6. The anisotropy constant of the magnetic crystal is large.
7. Large coercivity Hc (between AlNiCo alloy material and rare earth cobalt permanent magnet material)
8. High resistivity.