Offer your thoughts or opinion on the input financial query or topic using your financial background.

Are these really bond yields?
It's worth pointing out that a bulk of the bond market is institutional investors (read: large corporations and countries). For individuals, it's very easy to just put your cash in a checking account.  Checking accounts are insured and non-volatile.  But what happens when you're GE or Apple or Panama?   You can't just flop a couple billion dollars in to a Chase checking account and call it a day.  Although, you still need a safe place to store money that won't be terribly volatile.  GE can buy a billion dollars of treasury bonds.  Many companies need tremendous amounts of collateral on hand, amounts far in excess of the capacity of a checking account; those funds are stored in treasuries of some sort. Separately, a treasury bond is not a substitute investment for an S&P index fund.  For individuals they are two totally different investments with totally different characteristics.  The only reason an individual investor should compare the return of the S&P against the readily available yield of treasuries is to ensure the expected return of an equity investment can sufficiently pay for the additional risk.