These include NYSE, NASDAQ and AMEX
For a stock to be listed on the NYSE there is a rule that it's price must remain above 1 USD. During the sell off in 2009, this rule was temporarily suspended.
This is annoying. I apparently did too many day trades and suddenly need to have a balance of 25K USD. I can fill this soon, but I am wondering if I can wait 5 days and it'll be OK again. Nope, it looks like the account was flagged. If you maintain a 25K balance in each of your accounts you can avoid this rule.
IVV has an expense ratio of only 0.09%. It is listed on the NYSE
I couldn't find an easy way to buy bonds. ETFs seem easy enough to understand. Here's a quick table of collated info on iShares fixed income (bonds) funds.
IB provides access to bonds directly. There's also preferred stock which are similar to bonds.
iShares Fixed Income funds
| Ticker | Name | MER | Net Assets (M USD) |
| AGG | Lehman Aggregate Bond Fund | 0.24% | 9702 |
| SHY | Lehman 1-3 Year Treasury Bond Fund | 0.15% | 9156 |
| IEI | Lehman 3-7 Year Treasury Bond Fund | 0.15% | 824 |
| IEF | Lehman 7-10 Year Treasury Bond Fund | 0.15% | 2843 |
| TLH | Lehman 10-20 Year Treasury Bond Fund | 0.15% | 118 |
| TLT | Lehman 20+ Year Treasury Bond Fund | 0.15% | 1564 |
| SHV | Lehman Short Treasury Bond Fund | 0.15% | 1438 |
| TIP | Lehman TIPS Bond Fund | 0.29% | 8148 |
| GBP | Lehman Government/Credit Bond Fund | 0.20% | 91 |
| GVI | Lehman Intermediate Government/Credit Bond Fund | 0.20% | 215 |
| HYG | iBoxx $ High Yield Corporate Bond Fund | 0.50% | 939 |
| LQD | iBoxx $ Investment Grade Corporate Bond Fund | 0.15% | 4061 |
| CSJ | Lehman 1-3 Year Credit Bond Fund | 0.20% | 584 |
| CFT | Lehman Credit Bond Fund | 0.20% | 87 |
| CIU | Lehman Intermediate Credit Bond Fund | 0.20% | 295 |
| CMF | S&P California Municipal Bond Fund | 0.25% | 114 |
| MUB | S&P National Municipal Bond Fund | 0.25% | 686 |
| NYF | S&P New York Municipal Bond Fund | 0.25% | 30 |
| MBB | Lehman MBS Bond Fund | 0.36% | 781 |
| EMB | JPMorgan USD Emerging Markets Bond Fund | 0.60% | 117 |