Release 0.3.4

• Fixed caching bugs;
• Added openpyxl in requirements.txt.

Release 0.3.3

• Bugs fixed, and faster caching.

Release 0.3.2

• Use package yfinance instead of pandas_datareader to retrieve Yahoo Finance data.

Release 0.3.1

• Suppressing error messages when closing h5 file;
• More flexible MPT cost function.

Release 0.3.0

• More flexible optimization of portfolios

Release 0.2.1

• Fixed some important bugs about upside and downside risks.

Release 0.2.0

• More flexible portfolio optimization modules;
• Estimations of downside and upside risks.

Release 0.1.2

• Handle bugs regarding cached data retrieval.

Release 0.1.1

• More exception handling for caching; adding corresponding input arguments for caching.

Release 0.1.0

• Caching Yahoo Finance data, and do not query data online if they are cached.