Tag Archives: API

Yahoo Financial data API

Access financial data from web api at yahoo

Yahoo used to run a very rich API to financial data at , but, alas, it serves no more on most of the URLs. There is still a service, but it
is a pale shadow of the former. The former URLs had up to 84 parameters! (see the reference of the API at the bottom). Now
you can query


and you will get a return of Apple’s data, going back for decades:

Date,Open,High,Low,Close,Volume,Adj Close

It’s all comma delimited, and there doesn’t appear to be any secret xml switch. This is all dumbed down from what used to be there.
You can get the same result from another deprecated service they had at
http://ichart.finance.yahoo.com/table.csv?s=GOOG, again replacing
your S param with the symbol you wish to look up. No other params seem to make any difference to the request or will
result in a 404. One doesn’t seem to be able to pull multiple symbols in a single query.

There are other services that still seem to be running:

Download your CSV


which will give you a downloaded CSV with quotes in the form of:

"AAPL","Apple Inc.",112.72,-0.20,"-0.18%"
"GOOG","Google Inc.",628.59,-9.02,"-1.41%"

This is accepting multiple symbols. It also seems to be accepting many of the old parameters referenced below.
Perhaps this should be reworked into a little api as it’s pretty hairy just now. I might do that in R to see how useful
it could be for time series. the extension makes no difference to what the format is nor the actual file sent. So,

  • s = <+SYM>…
  • f =
  • e no difference

Want a chart?

You can request a symbol at http://chart.finance.yahoo.com/z?s=GOOG
and you will get Google stock chart

Want a snapshot, no historical, in XML?

You can still reach through to the backend through this quite amazing piece of internet fossil evidence.
will yield a *mostly
empty XML block. But, hey, it’s there.

Need a symbol, go here.

Parameter API

  • a Ask
  • a2 Average Daily Volume
  • a5 Ask Size
  • b Bid
  • b2 Ask (Real-time)
  • b3 Bid (Real-time)
  • b4 Book Value
  • b6 Bid Size
  • c Change & Percent Change
  • c1 Change
  • c3 Commission
  • c6 Change (Real-time)
  • c8 After Hours Change (Real-time)
  • d Dividend/Share
  • d1 Last Trade Date
  • d2 Trade Date
  • e Earnings/Share
  • e1 Error Indication (returned for symbol changed / invalid)
  • e7 EPS Estimate Current Year
  • e8 EPS Estimate Next Year
  • e9 EPS Estimate Next Quarter
  • f6 Float Shares
  • g Day’s Low
  • h Day’s High
  • j 52-week Low
  • k 52-week High
  • g1 Holdings Gain Percent
  • g3 Annualized Gain
  • g4 Holdings Gain
  • g5 Holdings Gain Percent (Real-time)
  • g6 Holdings Gain (Real-time)
  • i More Info
  • i5 Order Book (Real-time)
  • j1 Market Capitalization
  • j3 Market Cap (Real-time)
  • j4 EBITDA
  • j5 Change From 52-week Low
  • j6 Percent Change From 52-week Low
  • k1 Last Trade (Real-time) With Time
  • k2 Change Percent (Real-time)
  • k3 Last Trade Size
  • k4 Change From 52-week High
  • k5 Percebt Change From 52-week High
  • l Last Trade (With Time)
  • l1 Last Trade (Price Only)
  • l2 High Limit
  • l3 Low Limit
  • m Day’s Range
  • m2 Day’s Range (Real-time)
  • m3 50-day Moving Average
  • m4 200-day Moving Average
  • m5 Change From 200-day Moving Average
  • m6 Percent Change From 200-day Moving Average
  • m7 Change From 50-day Moving Average
  • m8 Percent Change From 50-day Moving Average
  • n Name
  • n4 Notes
  • o Open
  • p Previous Close
  • p1 Price Paid
  • p2 Change in Percent
  • p5 Price/Sales
  • p6 Price/Book
  • q Ex-Dividend Date
  • r P/E Ratio
  • r1 Dividend Pay Date
  • r2 P/E Ratio (Real-time)
  • r5 PEG Ratio
  • r6 Price/EPS Estimate Current Year
  • r7 Price/EPS Estimate Next Year
  • s Symbol
  • s1 Shares Owned
  • s7 Short Ratio
  • t1 Last Trade Time
  • t6 Trade Links
  • t7 Ticker Trend
  • t8 1 yr Target Price
  • v Volume
  • v1 Holdings Value
  • v7 Holdings Value (Real-time)
  • w 52-week Range
  • w1 Day’s Value Change
  • w4 Day’s Value Change (Real-time)
  • x Stock Exchange
  • y Dividend Yield