>Well, yes. The average daily trading volume in the US bond market is in the order of 0.8-1.0 trillion, which means 4 trillion over a span of several months is nothing.
I was talking about 4 trillion net. In other words, 4 trillion dollars worth of outflows. 1 trillion dollars worth of trades per day doesn't tell much because it could very well be people selling bonds and then buying other bonds. On the other hand, google says that the US bond market is worth $46 trillion. That's almost 9% pumped into the market. If all that cash stayed in the bond market and didn't leak out, you'd expect bond yields to drop by 9%[1], which I don't see happening.
[1] bonds are essentially IOUs. They have fixed returns, which means the more you pay for them, the lower your yield is. For instance, if you bought a bond that's worth $105 on maturity (1 year from now) for $100, your yield is 5%. If the fed comes in and pumps a bunch of money into the market such that $100 bond is now worth $108.69, then your yield is negative (you paid more for a bond than what it will pay back).
>Inflation doesn't come about as a result of the Fed pumping asset prices up, this is a misunderstanding on your part.
In the technical sense that inflation = CPI by definition, then yes you're right. But that's not what I was arguing for, which is that fed pumping money has inflated the market.