As I have a lot to do right am not really coming closer to my goal to write a general purpose app which can pull data from the yahoo streaming server. So I decided to post a few facts about the yahoo api. I hope this helps someone developing his app. So lets see what we have. First an explanation of these cryptic symbols:

a00: ask price

b00: bid price

g00: day’s range low

h00: day’s range high

j10: market cap

v00: volume

a50: ask size

b60: bid size

b30: ecn bid

o50: ecn bid size

z03: ecn ext hr bid

z04: ecn ext hr bid size

b20: ecn ask

o40: ecn ask size

z05: ecn ext hr ask

z07: ecn ext hr ask size

h01: ecn day’s high

g01: ecn day’s low

h02: ecn ext hr day’s high

g11: ecn ext hr day’s low

t10: last trade time, will be in unix epoch format

t50: ecnQuote/last/time

t51: ecn ext hour time

t53: RTQuote/last/time

t54: RTExthourQuote/last/time

l10: last trade

l90: ecnQuote/last/value

l91: ecn ext hour price

l84: RTQuote/last/value

l86: RTExthourQuote/last/value

c10: quote/change/absolute

c81: ecnQuote/afterHourChange/absolute

c60: ecnQuote/change/absolute

z02: ecn ext hour change

z08: ecn ext hour change

c63: RTQuote/change/absolute

c85: RTExthourQuote/afterHourChange/absolute

c64: RTExthourQuote/change/absolute

p20: quote/change/percent

c82: ecnQuote/afterHourChange/percent

p40: ecnQuote/change/percent

p41: ecn ext hour percent change

z09: ecn ext hour percent change

p43: RTQuote/change/percent

c86: RTExtHourQuote/afterHourChange/percent

p44: RTExtHourQuote/change/percent

These are the ones I found in the javascript sources. For most of it I don’t have a clue what it is for so don’t ask me what it means.

Next thing I want to mention is the result. A general approach would be to request your data and then run it through a proper JSON parser so you can work with the data as an object. Luckily this doesn’t work. The JSON returned is not 100 percent compliant with the JSON definition. Yahoo packs these symbols (seen above) not into quotes, so the parser denies to read it. A simple way around it is to string replace all possible symbols with quotes.

That’s it so far. I will post more if I have new information to share.