Re: FinancialData errors
- To: mathgroup at smc.vnet.net
- Subject: [mg120605] Re: FinancialData errors
- From: James Stein <mathgroup at stein.org>
- Date: Sat, 30 Jul 2011 06:03:47 -0400 (EDT)
- Delivered-to: l-mathgroup@mail-archive0.wolfram.com
- References: <201107222344.TAA28525@smc.vnet.net> <j0fos4$8p6$1@smc.vnet.net> <201107290842.EAA13406@smc.vnet.net>
You purchased shares at 10.36, which WAS the "closing" price for that day. (Note to PierPaolo: Mutual Funds, unlike stocks, do NOT trade DURING the day). The 10.23 price reported by Yahoo is an "adjusted" price. When a fund or stock makes a distribution (typically dividends or capital gains), all historical prices are "adjusted" downward in order that ROI between two dates is consistent. JANFX distributes dividends at the end of every month. Check out this URL: <http://finance.yahoo.com/q/hp?s=JANFX&a=01&b=10&c11&d=02&e&f11&g=d > Note that both "Close" and "Adj Close" are available, and if you check Mathematica's documentation you can learn how to obtain the former. The adjusted prices are the defaults. On Fri, Jul 29, 2011 at 1:42 AM, DrMajorBob <btreat1 at austin.rr.com> wrote: > I've found a new (to me) species of error in FinancialData. > > One example is the price of the following stock on Feb 10, 2011: > > s = "JANFX"; > FinancialData["JANFX", "Name"] > FinancialData["JANFX", {{2011, 2, 9}, {2011, 2, 11}}] > > "Janus Flexible Bond Fund D Shar" > > {{{2011, 2, 9}, 10.25}, {{2011, 2, 10}, 10.23}, {{2011, 2, 11}, > 10.24}} > > As you see, FinancialData says the price was 10.23. > > But I BOUGHT the stock through Janus Funds on that day, and the price was > 10.36. > > Moreover, if I go to Yahoo's interactive price chart for the stock at the > following page, 10.36 is the price I find: > > > http://finance.yahoo.com/echarts?s=JANFX+Interactive#chart3:symbol=janfx;range=ytd;indicator=volume;charttype=line;crosshair=on;ohlcvalues=0;logscale=on;source=undefined > > So... where are the errors really coming from? > > This is not an astronomically large price or a Missing["Not Available"] > price; it's within 2% of the correct price. But it's wrong. > > These errors make it very difficult to trust FinancialData for any useful > purpose. > > Bobby > > -- > DrMajorBob at yahoo.com > >
- References:
- Re: FinancialData still broken
- From: DANA DELOUIS <dana.del@gmail.com>
- FinancialData errors
- From: DrMajorBob <btreat1@austin.rr.com>
- Re: FinancialData still broken