I remember reading that Quantopian changes historical pricing to reflect stock splits and dividends. But I still don't understand why I would get the following price difference:

TQQQ graph from Stockcharts.com

So TQQQ was priced around $67 on Jan 4 2017, het Quantopian's code priced it at$139.47 . This is suspiciously close to 2 x the actual price.
code in algo:

        for i,stock in enumerate(context.stocks):
pr =  data.current(stock,"price")

log.info("{0} allocation  of {1} is ${2} " . format(allocation[i], stock.symbol, pr))  logfile:  2017-01-04 09:46 allocate:226 INFO return of allocation is [ 0.17176063 0. 0. 0. 0.82823937 0. ] 2017-01-04 09:46 allocate:243 INFO 0.171760630294 allocation of TQQQ is$132.16 2017-01-04 09:46 allocate:243 INFO 0.0 allocation of TLT is $119.46 2017-01-04 09:46 allocate:243 INFO 0.0 allocation of IJR is$139.35 2017-01-04 09:46 allocate:243 INFO 0.0 allocation of IJH is $167.5 2017-01-04 09:46 allocate:243 INFO 0.828239369706 allocation of XIV is$51.43 2017-01-04 09:46 allocate:243 INFO 0.0 allocation of TLT is \$119.46 

As far as I know, there were no reverse splits of TQQQ at the beginning of the year, so why is this price deviating from stockchart (or Yahoo) price so drastically?

Thanks

2 responses

Serge,

...As far as I know, there were no reverse splits of TQQQ at the beginning of the year...

Actually there was TQQQ 2 for 1 split on 01/12/2017

Vladimir, Where's that symbol for "sheepish grin" when you need it. Thanks! Mystery solved.