Why does SPY hourly show a gap, but not daily on Jan 30, 2018?

It's not fraud. It falls within reporting guidelines. Every trade has to be printed to the consolidated tape and there are different guidelines for different types of trades. It's not a copied trade, it was a trade that was unreported. Some large trades may go unreported until the following day for obvious reasons, block trades are given some leeway also, etc etc.. but the net effect they have on live data can be screwy.

 

Look at the hourly. Highest trade is 283.29.

Why would the daily show something higher?


EDIT: I reported this to NYSE a couple weeks ago. If it was an error, why didn't they fix it?

 

There's nothing to fix. The print was legit.

 

So where did 284.74 come from on Jan 30th? I can't find anything higher than 283.29.

 

You would need access to the consolidated tape for that day. Chances are, you will see a trade printed at 284.74 time-stamped for January 30th. There are many legitimate reasons for this to happen, not all trades are equal.
Take a look through the tape today and you will see many anomalies.

http://quotes.freerealtime.com/dl/frt/M?IM=quotes&type=Time&Sales&symbol=spy

 

No trades above 283.29 show on Yahoo's tape OR TradingView's tape. Why not?

 

The consolidated tape has nothing to do with yahoo or tradingview. It's likely they get filtered data.

 

So, Yahoo pays for data that isn't a complete record of all transactions?