The portfolio of an open-end mutual fund with 50,000 shares outstanding contained 1000 shares of ABC, 2000 shares of DEF, 2500 shares of GHI, and 5000 shares of JKL on a day where the closing price has been $100 for ABC, $50 for DEF, $40 for GHI, and $20 for JKL. Over the subsequent month, no capital inflow or outflow has occurred, and the realized returns on the constituent stocks have been 2% for ABC, 4% for DEF, -5% for GHI, and 1% for JKL, and ABC and DEF both paid $1 dividends. What must have been the growth rate of the mutual funds NAV over this one month period?