def buy_in_cash_nb(run_cash, run_shares, order_price, order_cash, order_fees,
order_fixed_fees, order_slippage):
"""Buy shares for `order_cash` cash.
Returns an updated cash and shares balance, and `vectorbt.portfolio.enums.FilledOrder`."""
# Get offered cash
offer_cash = min(run_cash, order_cash)
# Get effective cash by subtracting costs
if is_close_or_less_nb(offer_cash, order_fixed_fees):
# Can't cover
return run_cash, run_shares, None
effect_cash = (offer_cash - order_fixed_fees) * (1 - order_fees)
# Get price adjusted with slippage
adj_price = order_price * (1 + order_slippage)
# Get final size for that cash
final_size = effect_cash / adj_price
# Get paid fees
fees_paid = offer_cash - effect_cash
# Update current cash and shares
run_shares += final_size
if is_close_or_less_nb(run_cash, order_cash):
run_cash = 0. # numerical stability
else:
run_cash -= offer_cash
return run_cash, run_shares, FilledOrder(final_size, adj_price, fees_paid,
OrderSide.Buy)
def sell_in_shares_nb(run_cash, run_shares, order_price, order_size,
order_fees, order_fixed_fees, order_slippage):
"""Sell `order_size` shares.
Returns an updated cash and shares balance, and `vectorbt.portfolio.enums.FilledOrder`."""
# Get price adjusted with slippage
adj_price = order_price * (1 - order_slippage)
# Compute acquired cash
final_size = min(run_shares, order_size)
acq_cash = final_size * adj_price
# Get final cash by subtracting costs
final_cash = acq_cash * (1 - order_fees)
if is_close_or_less_nb(run_cash + final_cash, order_fixed_fees):
# Can't cover
return run_cash, run_shares, None
final_cash -= order_fixed_fees
# Update fees
fees_paid = acq_cash - final_cash
# Update current cash and shares
run_cash += final_size * adj_price - fees_paid
if is_close_or_less_nb(run_shares, order_size):
run_shares = 0. # numerical stability
else:
run_shares -= final_size
return run_cash, run_shares, FilledOrder(final_size, adj_price, fees_paid,
OrderSide.Sell)
def sell_nb(run_cash, run_shares, order):
"""Perform a Sell.
Returns an updated cash and shares balance, the number of shares sold,
the price adjusted with slippage, and fees paid."""
# Compute acquired cash
adj_price = order.price * (1 - order.slippage)
adj_size = min(run_shares, abs(order.size))
cash = adj_size * adj_price
# Minus costs
adj_cash = cash * (1 - order.fees)
if is_close_or_less_nb(adj_cash, order.fixed_fees):
# Can't cover
return run_cash, run_shares, None
adj_cash -= order.fixed_fees
# Update fees
fees_paid = cash - adj_cash
# Update current cash and shares
run_cash += adj_size * adj_price - fees_paid
if is_close_or_less_nb(run_shares, abs(order.size)):
run_shares = 0. # numerical stability
else:
run_shares -= adj_size
return run_cash, run_shares, FilledOrder(adj_size, adj_price, fees_paid,
OrderSide.Sell)
def sell_in_cash_nb(run_cash, run_shares, order_price, order_cash, order_fees,
order_fixed_fees, order_slippage):
"""Sell shares for `order_cash` cash.
Returns an updated cash and shares balance, and `vectorbt.portfolio.enums.FilledOrder`."""
# Get price adjusted with slippage
adj_price = order_price * (1 - order_slippage)
# Get value required to complete this order
req_value = (order_cash + order_fixed_fees) / (1 - order_fees)
# Translate this to shares
req_shares = req_value / adj_price
if is_close_or_less_nb(req_shares, run_shares):
# Sufficient shares
final_size = req_shares
fees_paid = req_value - order_cash
# Update current cash and shares
run_cash += order_cash
run_shares -= req_shares
else:
# Insufficient shares, cash will be less than requested
final_size = run_shares
acq_cash = final_size * adj_price
# Get final cash by subtracting costs
final_cash = acq_cash * (1 - order_fees)
if is_close_or_less_nb(run_cash + final_cash, order_fixed_fees):
# Can't cover
return run_cash, run_shares, None
final_cash -= order_fixed_fees
# Update fees
fees_paid = acq_cash - final_cash
# Update current cash and shares
run_cash += final_cash
run_shares = 0.
return run_cash, run_shares, FilledOrder(final_size, adj_price, fees_paid,
OrderSide.Sell)
def buy_in_shares_nb(run_cash, run_shares, order_price, order_size, order_fees,
order_fixed_fees, order_slippage):
"""Buy `order_size` shares.
Returns an updated cash and shares balance, and `vectorbt.portfolio.enums.FilledOrder`."""
# Get price adjusted with slippage
adj_price = order_price * (1 + order_slippage)
# Get cash required to complete this order
req_cash = order_size * adj_price
adj_req_cash = req_cash * (1 + order_fees) + order_fixed_fees
if is_close_or_less_nb(adj_req_cash, run_cash):
# Sufficient cash
final_size = order_size
fees_paid = adj_req_cash - req_cash
# Update current cash and shares
run_cash -= order_size * adj_price + fees_paid
run_shares += final_size
else:
# Insufficient cash, size will be less than requested
if is_close_or_less_nb(run_cash, order_fixed_fees):
# Can't cover
return run_cash, run_shares, None
# For fees of 10% and 1$ per transaction, you can buy shares for 90$ (effect_cash)
# to spend 100$ (adj_req_cash) in total
effect_cash = (run_cash - order_fixed_fees) / (1 + order_fees)
# Update size and fees
final_size = effect_cash / adj_price
fees_paid = run_cash - effect_cash
# Update current cash and shares
run_cash = 0. # numerical stability
run_shares += final_size
# Return filled order
return run_cash, run_shares, FilledOrder(final_size, adj_price, fees_paid,
OrderSide.Buy)
def buy_nb(run_cash, run_shares, order):
"""Perform a Buy.
Returns an updated cash and shares balance, the number of shares bought,
the price adjusted with slippage, and fees paid."""
# Compute cash required to complete this order
adj_price = order.price * (1 + order.slippage)
req_cash = order.size * adj_price
adj_req_cash = req_cash * (1 + order.fees) + order.fixed_fees
if is_close_or_less_nb(adj_req_cash, run_cash):
# Sufficient cash
adj_size = order.size
fees_paid = adj_req_cash - req_cash
# Update current cash and shares
run_cash -= adj_size * adj_price + fees_paid
run_shares += adj_size
else:
# Insufficient cash, size will be less than requested
if is_close_or_less_nb(run_cash, order.fixed_fees):
# Can't cover
return run_cash, run_shares, None
# For fees of 10%, you can buy shares for 90.9$ (adj_cash) to spend 100$ (run_cash) in total
adj_cash = (run_cash - order.fixed_fees) / (1 + order.fees)
# Update size and feee
adj_size = adj_cash / adj_price
fees_paid = run_cash - adj_cash
# Update current cash and shares
run_cash = 0. # numerical stability
run_shares += adj_size
# Return filled order
return run_cash, run_shares, FilledOrder(adj_size, adj_price, fees_paid,
OrderSide.Buy)
