A Python library for analysis of fixed income instruments in Brazil
Project description
PYield: Brazilian Fixed Income Toolkit
PYield is a Python library designed for the analysis of Brazilian fixed income instruments. Leveraging the power of popular Python libraries like Pandas and Requests, PYield simplifies the process of obtaining and processing data from key sources such as ANBIMA, BCB, IBGE and B3.
Documentation: https://crdcj.github.io/PYield/
Source Code: https://github.com/crdcj/PYield
Key Features
- Data Collection: Automated fetching of data from ANBIMA and B3.
- Data Processing: Efficient processing and normalization of fixed income data.
- Analysis Tools: Built-in functions for common analysis tasks in fixed income markets.
- Easy Integration: Seamless integration with pandas data analysis workflows.
- Type Hints: Full support for static type checking, enhancing development experience and code quality.
Installation
You can install PYield using pip:
pip install pyield
How to use PYield
Important Note on Date Formats
When using date strings in PYield functions, please ensure that the date format is day-first (e.g., "31-05-2024"). This format was chosen to be consistent with the Brazilian date convention.
For production code, it is recommended to parse date strings with pandas.to_datetime
using an explicit format to avoid ambiguity and ensure consistency.
For example:
import pandas as pd
# Converting a date string to a pandas Timestamp with a specific format
date = pd.to_datetime("2024/31/05", format="%Y/%d/%m")
date = pd.to_datetime("05-31-2024", format="%m-%d-%Y")
Brazilian Treasury Bonds Tools
>>> from pyield import ntnb, ntnf, ltn
# Calculate the quotation of a NTN-B bond as per ANBIMA's rules
>>> ntnb.quotation("31-05-2024", "15-05-2035", 0.061490)
99.3651
>>> ntnb.quotation("31-05-2024", "15-08-2060", 0.061878)
99.5341
# Calculate the DI Spread of NTN-F bonds in a given date
>>> ntnf.di_spreads("17-07-2024")
2025-01-01 -2.31
2027-01-01 -1.88
2029-01-01 -3.26
2031-01-01 3.61
2033-01-01 -3.12
2035-01-01 -1.00
Name: DISpread, dtype: Float64
# Get ANBIMA's indicative rates for LTN bonds
>>> ltn.anbima_rates("17-07-2024")
2024-10-01 0.104236
2025-01-01 0.105400
2025-04-01 0.107454
2025-07-01 0.108924
2025-10-01 0.110751
2026-01-01 0.111753
2026-04-01 0.112980
2026-07-01 0.113870
2026-10-01 0.114592
2027-07-01 0.116090
2028-01-01 0.117160
2028-07-01 0.118335
2030-01-01 0.120090
Name: IndicativeRate, dtype: Float64
Business Days Tools (Brazilian holidays are automatically considered)
>>> from pyield import bday
# Count the number of business days between two dates
# Start date is included, end date is excluded
>>> bday.count(start='29-12-2023', end='02-01-2024')
1
# Get the next business day after a given date (offset=1)
>>> bday.offset(dates="29-12-2023", offset=1)
Timestamp('2024-01-02 00:00:00')
# Get the next business day if it is not a business day (offset=0)
>>> bday.offset(dates="30-12-2023", offset=0)
Timestamp('2024-01-02 00:00:00')
# Since 29-12-2023 is a business day, it returns the same date (offset=0)
>>> bday.offset(dates="29-12-2023", offset=0)
Timestamp('2023-12-29 00:00:00')
# Generate a pandas series with the business days between two dates
>>> bday.generate(start='29-12-2023', end='03-01-2024')
0 2023-12-29
1 2024-01-02
2 2024-01-03
dtype: datetime64[ns]
Futures Data
>>> import pyield as yd
# Fetch current DI Futures data from B3 (15 minutes delay)
>>> yd.futures(contract_code="DI1")
TradeTime TickerSymbol ExpirationDate BDaysToExp ... MaxRate LastAskRate LastBidRate CurrentRate
2024-04-21 13:37:39 DI1K24 2024-05-02 7 ... 0.10660 0.10652 0.10660 0.10660
2024-04-21 13:37:39 DI1M24 2024-06-03 28 ... 0.10518 0.10510 0.10516 0.10518
2024-04-21 13:37:39 DI1N24 2024-07-01 48 ... 0.10480 0.10456 0.10462 0.10460
... ... ... ... ... ... ... ... ...
2024-04-21 13:37:39 DI1F37 2037-01-02 3183 ... <NA> <NA> 0.11600 <NA>
2024-04-21 13:37:39 DI1F38 2038-01-04 3432 ... <NA> <NA> 0.11600 <NA>
2024-04-21 13:37:39 DI1F39 2039-01-03 3683 ... <NA> <NA> <NA> <NA>
# Fetch historical DI Futures data from B3
>>> yd.futures(contract_code="DI1", reference_date='08-03-2024')
TradeDate TickerSymbol ExpirationDate BDaysToExp ... LastRate LastAskRate LastBidRate SettlementRate
2024-03-08 DI1J24 2024-04-01 15 ... 10.952 10.952 10.956 10.956
2024-03-08 DI1K24 2024-05-02 37 ... 10.776 10.774 10.780 10.777
2024-03-08 DI1M24 2024-06-03 58 ... 10.604 10.602 10.604 10.608
... ... ... ... ... ... ... ... ...
2024-03-08 DI1F37 2037-01-02 3213 ... <NA> <NA> <NA> 10.859
2024-03-08 DI1F38 2038-01-04 3462 ... <NA> <NA> <NA> 10.859
2024-03-08 DI1F39 2039-01-03 3713 ... <NA> <NA> <NA> 10.85
Indicators Data
>>> import pyield as yd
# Fetch the SELIC target rate from the Central Bank of Brazil
>>> yd.indicator(indicator_code="SELIC_TARGET", reference_date='12-04-2024')
0.1075 # 10.75%
# Fetch the IPCA monthly inflation rate from IBGE
>>> yd.indicator(indicator_code="IPCA_MR", reference_date='18-03-2024')
0.0016 # 0.16%
Projections Data
>>> import pyield as yd
# Fetch current month projection for IPCA from IBGE API
>>> ipca = yd.projection(projection_code="IPCA_CM")
>>> print(ipca)
IndicatorProjection(
last_updated=Timestamp('2024-04-19 18:55:00'),
reference_month_ts=Timestamp('2024-04-01 00:00:00'),
reference_month_br='ABR/2024',
projected_value=0.0035 # 0.35%
)
>>> ipca.projected_value
0.0035 # 0.35%
Interpolation Tools
>>> from pyield import Interpolator
# Interpolate interest rates for specific business days using the Interpolator class.
# Initialize the Interpolator with known business days and interest rates.
>>> known_bdays = [30, 60, 90]
>>> known_rates = [0.045, 0.05, 0.055]
>>> linear_interpolator = Interpolator("linear", known_bdays, known_rates)
# Interpolate the interest rate for a given number of business days.
>>> linear_interpolator(45)
0.0475
# Use the flat forward method for interpolation.
>>> ff_interpolator = Interpolator("flat_forward", known_bdays, known_rates)
>>> ff_interpolator(45)
0.04833068080970859
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