# 10% smallest cap stock > 来源：https://uqer.io/community/share/5663e2f4f9f06c6c8a91b391 ```py import numpy as np start = '2011-01-05' # 回测起始时间 end = '2015-12-01' # 回测结束时间 benchmark = 'HS300' # 策略参考标准 universe = StockScreener(Factor.LCAP.nsmall(40)) capital_base = 100000 # 起始资金 freq = 'd' # 策略类型，'d'表示日间策略使用日线回测，'m'表示日内策略使用分钟线回测 refresh_rate = 1 # 调仓频率，表示执行handle_data的时间间隔，若freq = 'd'时间间隔的单位为交易日，若freq = 'm'时间间隔为分钟 def initialize(account): # 初始化虚拟账户状态 account.empty = True def handle_data(account): # 每个交易日的买入卖出指令 today = account.current_date if today.month == 12 and account.empty: account.empty = False for stock in account.universe: p = account.referencePrice.get(stock, 0) if np.isnan(p) or p == 0: continue order_pct_to(stock, 0.025) elif today.month == 4 and not account.empty: account.empty = True for stock in account.universe: if stock in account.valid_secpos: order_to(stock,0) ```