Discrepancy Between yf.download & yf.Ticker().history()

[keg5038]

I am looking at Wheat Futures data (ticker=ZWZ22.CBT) & getting a discrepancy when running the following:

yf.Ticker("ZWZ22.CBT").history(interval="1d",period="10d").tail(30)

Returns data including today's trading day 2022-07-18.

Comparing this to: yf.download('ZWZ22.CBT') Which doesn't include 2022-07-18. The last day is 2022-07-15.

Why is there this discrepancy?

[ValueRaider]

yfinance doesn't handle timezones well, so often returned data is off by one day. Except when period is specified, then Yahoo handles the timezones.

I have a branch that should fix this but needs volunteers to test before I merge. See https://github.com/ranaroussi/yfinance/issues/954#issuecomment-1182558587

[keg5038]

Thank you @ValueRaider for your quick response! I did a bit more testing & it looks like something to do with the start being specified as well:

yf.download("ZWZ22.CBT ZWU22.CBT", interval="1d",period='10d') This shows correctly, including 2022-07-19 data

The same command with 'start' included: yf.download("ZWZ22.CBT ZWU22.CBT",start='2022-07-01', interval="1d",period='10d') Information is the same as above, but does not include 2022-07-19 data.

I am not much of a programmer & have never contributed to open source but would be willing to try to help test if that would be helpful. Any suggestions on how to help?

[ValueRaider]

Click the link. Then just use it, provide feedback.

[ValueRaider]

This should be solved in recent releases.