Generate narration based on given points below - 
Portfolio performance - dec - -1.9
Portfolio performance - feb - 4.3
Contribution of NAME_1 Total Stock Market ETF - Feb - 4.3%
Contribution of NAME_2 20+ Year Treasury Bond ETF - Feb - 2.4%
Contribution of NAME_2 S&P GSCI Commodity-Indexed Trust - Feb - -4.3%
