def display_ef(
stocks: List[str],
period: str = "3mo",
n_portfolios: int = 300,
risk_free: bool = False,
):
"""Display efficient frontier
Parameters
----------
stocks : List[str]
List of the stocks to be included in the weights
other_args : List[str]
argparse other args
"""
fig, ax = plt.subplots(figsize=plot_autoscale(), dpi=PLOT_DPI)
ef, rets, stds = optimizer_model.generate_random_portfolios(
stocks, period, n_portfolios)
# The ef needs to be deep-copied to avoid error in plotting sharpe
ef2 = copy.deepcopy(ef)
sharpes = rets / stds
ax.scatter(stds, rets, marker=".", c=sharpes, cmap="viridis_r")
for ticker, ret, std in zip(ef.tickers, ef.expected_returns,
np.sqrt(np.diag(ef.cov_matrix))):
ax.annotate(ticker, (std * 1.01, ret))
plotting.plot_efficient_frontier(ef, ax=ax, show_assets=True)
# Find the tangency portfolio
rfrate = get_rf()
ef2.max_sharpe(risk_free_rate=rfrate)
ret_sharpe, std_sharpe, _ = ef2.portfolio_performance(
verbose=True, risk_free_rate=rfrate)
ax.scatter(std_sharpe,
ret_sharpe,
marker="*",
s=100,
c="r",
label="Max Sharpe")
# Add risk free line
if risk_free:
y = ret_sharpe * 1.2
b = get_rf()
m = (ret_sharpe - b) / std_sharpe
x2 = (y - b) / m
x = [0, x2]
y = [b, y]
line = Line2D(x, y, color="#FF0000", label="Capital Allocation Line")
ax.set_xlim(xmin=min(stds) * 0.8)
ax.add_line(line)
ax.set_title(f"Efficient Frontier simulating {n_portfolios} portfolios")
ax.legend()
fig.tight_layout()
ax.grid(b=True, which="major", color="#666666", linestyle="-")
if gtff.USE_ION:
plt.ion()
plt.show()
console.print("")
def show_ef(stocks: List[str], other_args: List[str]):
parser = argparse.ArgumentParser(add_help=False, prog="ef")
parser.add_argument(
"-p",
"--period",
default="3mo",
dest="period",
help="period to get yfinance data from",
choices=period_choices,
)
parser.add_argument(
"-n", default=300, dest="n_port", help="number of portfolios to simulate"
)
try:
ns_parser = parse_known_args_and_warn(parser, other_args)
if not ns_parser:
return
if len(stocks) < 2:
print("Please have at least 2 loaded tickers to calculate weights.\n")
return
stock_prices = process_stocks(stocks, ns_parser.period)
mu = expected_returns.mean_historical_return(stock_prices)
S = risk_models.sample_cov(stock_prices)
ef = EfficientFrontier(mu, S)
fig, ax = plt.subplots(figsize=plot_autoscale(), dpi=PLOT_DPI)
# Generate random portfolios
n_samples = ns_parser.n_port
w = np.random.dirichlet(np.ones(len(mu)), n_samples)
rets = w.dot(mu)
stds = np.sqrt(np.diag(w @ S @ w.T))
sharpes = rets / stds
ax.scatter(stds, rets, marker=".", c=sharpes, cmap="viridis_r")
plotting.plot_efficient_frontier(ef, ax=ax, show_assets=True)
# Find the tangency portfolio
ef.max_sharpe()
ret_sharpe, std_sharpe, _ = ef.portfolio_performance()
ax.scatter(std_sharpe, ret_sharpe, marker="*", s=100, c="r", label="Max Sharpe")
ax.set_title("Efficient Frontier")
ax.legend()
plt.tight_layout()
plt.grid(b=True, which="major", color="#666666", linestyle="-")
plt.minorticks_on()
plt.grid(b=True, which="minor", color="#999999", linestyle="-", alpha=0.2)
if gtff.USE_ION:
plt.ion()
plt.show()
print("")
except Exception as e:
print(e)
print("")
def plot_stock_insights(stock_price, Portfolio):
mu = expected_returns.mean_historical_return(stock_price)
S = risk_models.sample_cov(stock_price)
ef = EfficientFrontier(mu, S)
cleaned_weights = ef.clean_weights()
cla = CLA(mu, S)
plotting.plot_efficient_frontier(cla)
plotting.plot_covariance(S)
plotting.plot_weights(cleaned_weights)
def test_cla_plot_ax():
plt.figure()
df = get_data()
rets = expected_returns.mean_historical_return(df)
S = risk_models.exp_cov(df)
cla = CLA(rets, S)
fig, ax = plt.subplots(figsize=(12, 10))
plotting.plot_efficient_frontier(cla, ax=ax)
assert len(ax.findobj()) == 143
plt.close()
plt.close()
def test_cla_plot():
df = get_data()
rets = expected_returns.mean_historical_return(df)
S = risk_models.exp_cov(df)
cla = CLA(rets, S)
ax = plotting.plot_efficient_frontier(cla, showfig=False)
assert len(ax.findobj()) == 143
ax = plotting.plot_efficient_frontier(cla,
show_assets=False,
showfig=False)
assert len(ax.findobj()) == 161
def test_default_ef_plot():
plt.figure()
ef = setup_efficient_frontier()
ax = plotting.plot_efficient_frontier(ef, show_assets=True)
assert len(ax.findobj()) == 125
plt.clf()
# with constraints
ef = setup_efficient_frontier()
ef.add_constraint(lambda x: x <= 0.15)
ef.add_constraint(lambda x: x[0] == 0.05)
ax = plotting.plot_efficient_frontier(ef)
assert len(ax.findobj()) == 125
plt.clf()
plt.close()
def test_plotting_edge_case():
# raised in issue #333
mu = pd.Series([0.043389, 0.036194])
S = pd.DataFrame([[0.000562, 0.002273], [0.002273, 0.027710]])
ef = EfficientFrontier(mu, S)
fig, ax = plt.subplots()
with pytest.warns(UserWarning):
plotting.plot_efficient_frontier(
ef,
ef_param="return",
ef_param_range=np.linspace(0.036194, 0.043389, 10),
ax=ax,
show_assets=False,
)
def test_ef_plot_utility():
ef = setup_efficient_frontier()
delta_range = np.arange(0.001, 100, 1)
ax = plotting.plot_efficient_frontier(ef,
ef_param_range=delta_range,
showfig=False)
assert len(ax.findobj()) == 125
def test_ef_plot_errors():
plt.figure()
ef = setup_efficient_frontier()
delta_range = np.arange(0.001, 50, 1)
# Test invalid ef_param
with pytest.raises(NotImplementedError):
plotting.plot_efficient_frontier(
ef, ef_param="blah", ef_param_range=delta_range, showfig=False
)
# Test invalid optimizer
with pytest.raises(NotImplementedError):
plotting.plot_efficient_frontier(
None, ef_param_range=delta_range, showfig=False
)
plt.clf()
plt.close()
def ef_plot_return():
ef = setup_efficient_frontier()
return_range = np.linspace(0, ef.expected_returns.max(), 50)
ax = plotting.plot_efficient_frontier(ef,
ef_param="return",
ef_param_range=return_range,
showfig=False)
assert len(ax.findobj()) == 125
def test_ef_plot_utility_short():
ef = EfficientFrontier(*setup_efficient_frontier(data_only=True),
weight_bounds=(None, None))
delta_range = np.linspace(0.001, 20, 100)
ax = plotting.plot_efficient_frontier(ef,
ef_param_range=delta_range,
showfig=False)
assert len(ax.findobj()) == 161
def test_default_ef_plot_labels():
plt.figure()
ef = setup_efficient_frontier()
ax = plotting.plot_efficient_frontier(ef,
show_assets=True,
show_tickers=True)
assert len(ax.findobj()) == 124 + len(ef.tickers)
plt.clf()
def test_ef_plot_utility():
plt.figure()
ef = setup_efficient_frontier()
delta_range = np.arange(0.001, 50, 1)
ax = plotting.plot_efficient_frontier(
ef, ef_param="utility", ef_param_range=delta_range, showfig=False
)
assert len(ax.findobj()) == 125
plt.clf()
plt.close()
def test_constrained_ef_plot_utility():
ef = setup_efficient_frontier()
ef.add_constraint(lambda w: w[0] >= 0.2)
ef.add_constraint(lambda w: w[2] == 0.15)
ef.add_constraint(lambda w: w[3] + w[4] <= 0.10)
delta_range = np.linspace(0.001, 20, 100)
ax = plotting.plot_efficient_frontier(ef,
ef_param_range=delta_range,
showfig=False)
assert len(ax.findobj()) == 125
def test_ef_plot_return():
plt.figure()
ef = setup_efficient_frontier()
# Internally _max_return() is used, so subtract epsilon
max_ret = ef.expected_returns.max() - 0.0001
return_range = np.linspace(0, max_ret, 30)
ax = plotting.plot_efficient_frontier(
ef, ef_param="return", ef_param_range=return_range, showfig=False
)
assert len(ax.findobj()) == 125
plt.clf()
plt.close()
def test_ef_plot_risk():
ef = setup_efficient_frontier()
ef.min_volatility()
min_risk = ef.portfolio_performance()[1]
ef = setup_efficient_frontier()
risk_range = np.linspace(min_risk + 0.05, 0.5, 50)
ax = plotting.plot_efficient_frontier(ef,
ef_param="risk",
ef_param_range=risk_range,
showfig=False)
assert len(ax.findobj()) == 125
def plot_stock_insights(self, scatter=False):
ef = EfficientFrontier(self.mu, self.S)
weights = ef.max_sharpe()
cleaned_weights = ef.clean_weights()
cla = CLA(self.mu, self.S)
try:
eff_front = plotting.plot_efficient_frontier(cla)
eff_front.tick_params(axis='both', which='major', labelsize=5)
eff_front.tick_params(axis='both', which='minor', labelsize=5)
eff_front.get_figure().savefig(os.path.join(
self.output_path, "efficient_frontier.png"),
dpi=300)
except:
print("Failed to plot efficient frontier")
cov = plotting.plot_covariance(self.S)
weights_bar = plotting.plot_weights(cleaned_weights)
if self.save_output:
cov.tick_params(axis='both', which='major', labelsize=5)
cov.tick_params(axis='both', which='minor', labelsize=5)
cov.get_figure().savefig(os.path.join(self.output_path,
"cov_matrix.png"),
dpi=300)
weights_bar.tick_params(axis='both', which='major', labelsize=5)
weights_bar.tick_params(axis='both', which='minor', labelsize=5)
weights_bar.get_figure().savefig(os.path.join(
self.output_path, "weights_bar.png"),
dpi=300)
retscomp = self.stock_prices.pct_change()
corrMatrix = retscomp.corr()
corr_heat = sns.heatmap(corrMatrix, xticklabels=True, yticklabels=True)
plt.title("Corr heatmap")
if self.save_output:
corr_heat.tick_params(axis='both', which='major', labelsize=5)
corr_heat.tick_params(axis='both', which='minor', labelsize=5)
fig = corr_heat.get_figure()
fig.figsize = (10, 10)
fig.savefig(os.path.join(self.output_path, "corr_heatmap.png"),
dpi=300)
plt.show()
if scatter:
plt.figure()
plt.title("Corr scatter")
self.scattermat = pd.plotting.scatter_matrix(retscomp,
diagonal='kde',
figsize=(10, 10))
if self.save_output:
plt.savefig(os.path.join(self.output_path, "corr_scatter.png"),
dpi=300)
plt.show()
def test_ef_plot_return():
plt.figure()
ef = setup_efficient_frontier()
# FIXME: Internally _max_return() is used, which uses a solver so can have numerical differences to the inputs.
# hence the epsilon here
max_ret = ef.expected_returns.max() - 0.0001
return_range = np.linspace(0, max_ret, 50)
ax = plotting.plot_efficient_frontier(ef,
ef_param="return",
ef_param_range=return_range,
showfig=False)
assert len(ax.findobj()) == 125
plt.clf()
plt.close()
def test_constrained_ef_plot_risk():
ef = EfficientFrontier(*setup_efficient_frontier(data_only=True),
weight_bounds=(None, None))
ef.add_constraint(lambda w: w[0] >= 0.2)
ef.add_constraint(lambda w: w[2] == 0.15)
ef.add_constraint(lambda w: w[3] + w[4] <= 0.10)
# 100 portfolios with risks between 0.10 and 0.30
risk_range = np.linspace(0.157, 0.40, 100)
ax = plotting.plot_efficient_frontier(ef,
ef_param="risk",
ef_param_range=risk_range,
show_assets=True,
showfig=False)
assert len(ax.findobj()) == 137
num_small = len([k for k in weights if weights[k] <= 1e-4])
print(f"{num_small}/{len(ef.tickers)} ticker have zero weight")
# In[13]:
ef.portfolio_performance(verbose=True)
# In[14]:
from pypfopt import CLA, plotting
cla = CLA(mu, S)
cla.max_sharpe()
cla.portfolio_performance(verbose=True)
ax = plotting.plot_efficient_frontier(cla, showfig=False)
# In[15]:
"""
We could have a portfolio with annual vol of 11.4% and expected annual return of 22.3%.
It is possible to obtain a positive SR by defining portfolios with stocks that are part of the ibovespa index.
This output, despite interesting, is not useful in itself. Let's then convert it into an allocation that
an investor could use to weight her own portfolio
"""
# In[18]:
from pypfopt.discrete_allocation import DiscreteAllocation, get_latest_prices
latest_prices = get_latest_prices(df)
end='2020-06-06',
data_source='yahoo')
price_data.append(prices.assign(ticker=ticker)[['Adj Close']])
df_stocks = pd.concat(price_data, axis=1)
df_stocks.columns = tickers
df_stocks.head()
#Annualized Return
mu = expected_returns.mean_historical_return(df_stocks)
#Sample Variance of Portfolio
Sigma = risk_models.sample_cov(df_stocks)
#Max Sharpe Ratio - Tangent to the EF
ef = EfficientFrontier(mu, Sigma, weight_bounds=(0, 1))
fig, ax = plt.subplots()
plotting.plot_efficient_frontier(ef)
ef.max_sharpe()
ret_tangent, std_tangent, _ = ef.portfolio_performance()
ax.scatter(std_tangent,
ret_tangent,
marker="*",
s=100,
c="r",
label="Max Sharpe")
ax.set_title("Efficient Frontier")
ax.legend()
plt.tight_layout()
plt.show()
#Максимальный коэффициент Шарпа
ef = EfficientFrontier(
mu, Sigma,
weight_bounds=(0, 1)) #weight bounds in negative allows shorting of stocks
sharpe_pfolio = ef.max_sharpe(
) #May use add objective to ensure minimum zero weighting to individual stocks
sharpe_pwt = ef.clean_weights()
print(sharpe_pwt)
ef.portfolio_performance(verbose=True)
ef1 = EfficientFrontier(mu, Sigma, weight_bounds=(0, 1))
minvol = ef1.min_volatility()
minvol_pwt = ef1.clean_weights()
print(minvol_pwt)
ef1.portfolio_performance(verbose=True, risk_free_rate=0.27)
cl_obj = CLA(mu, Sigma)
ax = pplt.plot_efficient_frontier(cl_obj, showfig=False)
ax.xaxis.set_major_formatter(FuncFormatter(lambda x, _: '{:.0%}'.format(x)))
ax.yaxis.set_major_formatter(FuncFormatter(lambda y, _: '{:.0%}'.format(y)))
lalatest_prices = get_latest_prices(df_stocks)
allocation_minv, rem_minv = DiscreteAllocation(
minvol_pwt, latest_prices, total_portfolio_value=100000).lp_portfolio()
print(allocation_minv)
print(
"Осталось денежных средств после построения портфеля с минимальной волатильностью - {:.2f} рублей"
.format(rem_minv))
print()
latest_prices1 = get_latest_prices(df_stocks)
allocation_shp, rem_shp = DiscreteAllocation(
sharpe_pwt, latest_prices1, total_portfolio_value=100000).lp_portfolio()
print(allocation_shp)
print(
def show_ef(stocks: List[str], other_args: List[str]):
"""Display efficient frontier
Parameters
----------
stocks : List[str]
List of the stocks to be included in the weights
other_args : List[str]
argparse other args
"""
parser = argparse.ArgumentParser(
add_help=False,
formatter_class=argparse.ArgumentDefaultsHelpFormatter,
prog="ef",
description="""This function plots random portfolios based
on their risk and returns and shows the efficient frontier.""",
)
parser.add_argument(
"-p",
"--period",
default="3mo",
dest="period",
help="period to get yfinance data from",
choices=period_choices,
)
parser.add_argument(
"-n",
"--number-portfolios",
default=300,
type=check_non_negative,
dest="n_port",
help="number of portfolios to simulate",
)
try:
if other_args:
if "-" not in other_args[0]:
other_args.insert(0, "-n")
ns_parser = parse_known_args_and_warn(parser, other_args)
if not ns_parser:
return
if len(stocks) < 2:
print(
"Please have at least 2 loaded tickers to calculate weights.\n"
)
return
stock_prices = process_stocks(stocks, ns_parser.period)
mu = expected_returns.mean_historical_return(stock_prices)
S = risk_models.sample_cov(stock_prices)
ef = EfficientFrontier(mu, S)
_, ax = plt.subplots(figsize=plot_autoscale(), dpi=PLOT_DPI)
# Generate random portfolios
n_samples = ns_parser.n_port
w = np.random.dirichlet(np.ones(len(mu)), n_samples)
rets = w.dot(mu)
stds = np.sqrt(np.diag(w @ S @ w.T))
sharpes = rets / stds
ax.scatter(stds, rets, marker=".", c=sharpes, cmap="viridis_r")
plotting.plot_efficient_frontier(ef, ax=ax, show_assets=True)
# Find the tangency portfolio
ef.max_sharpe()
ret_sharpe, std_sharpe, _ = ef.portfolio_performance()
ax.scatter(std_sharpe,
ret_sharpe,
marker="*",
s=100,
c="r",
label="Max Sharpe")
ax.set_title(
f"Efficient Frontier simulating {ns_parser.n_port} portfolios")
ax.legend()
plt.tight_layout()
plt.grid(b=True, which="major", color="#666666", linestyle="-")
plt.minorticks_on()
plt.grid(b=True,
which="minor",
color="#999999",
linestyle="-",
alpha=0.2)
if gtff.USE_ION:
plt.ion()
plt.show()
print("")
except Exception as e:
print(e, "\n")
'MA': 0.03812737349732021,
'PFE': 0.07786528342813454,
'RRC': 0.03161528695094597,
'SBUX': 0.039844436656239136,
'SHLD': 0.027113184241298865,
'T': 0.11138956508836476,
'UAA': 0.02711590957075009,
'WMT': 0.10569551148587905,
'XOM': 0.11175337115721229}
"""
# Crticial Line Algorithm
cla = CLA(mu, S)
print(cla.max_sharpe())
cla.portfolio_performance(verbose=True)
plotting.plot_efficient_frontier(cla) # to plot
"""
{'GOOG': 0.020889868669945022,
'AAPL': 0.08867994115132602,
'FB': 0.19417572932251745,
'BABA': 0.10492386821217001,
'AMZN': 0.0644908140418782,
'GE': 0.0,
'AMD': 0.0,
'WMT': 0.0034898157701416382,
'BAC': 0.0,
'GM': 0.0,
'T': 2.4138966206946562e-19,
'UAA': 0.0,
'SHLD': 0.0,
'XOM': 0.0005100736411646903,
# df = pd.read_csv("tests/resources/stock_prices.csv", parse_dates=True, index_col="date")
df = pd.read_csv(os.path.join(path, 'stock_prices.csv'),
parse_dates=True,
index_col="Date")
returns = df.pct_change().dropna()
# Calculate expected returns and sample covariance
mu = expected_returns.mean_historical_return(df)
S = risk_models.sample_cov(df)
# Optimise for maximal Sharpe ratio
ef = EfficientFrontier(mu, S)
raw_weights = ef.max_sharpe()
cleaned_weights = ef.clean_weights()
ef.save_weights_to_file("weights.csv") # saves to file
print(cleaned_weights)
ef.portfolio_performance(verbose=True)
latest_prices = get_latest_prices(df)
da = DiscreteAllocation(cleaned_weights,
latest_prices,
total_portfolio_value=600)
allocation, leftover = da.lp_portfolio()
print("Discrete allocation:", allocation)
print("Funds remaining: ${:.2f}".format(leftover))
cla = CLA(mu, S)
plotting.plot_efficient_frontier(cla)
plotting.plot_covariance(S)
plotting.plot_weights(cleaned_weights)
def display_ef(
stocks: List[str],
period: str = "3mo",
n_portfolios: int = 300,
risk_free: bool = False,
external_axes: Optional[List[plt.Axes]] = None,
):
"""Display efficient frontier
Parameters
----------
stocks : List[str]
List of the stocks to be included in the weights
period : str
Time period to get returns for
n_portfolios: int
Number of portfolios to simulate
external_axes: Optional[List[plt.Axes]]
Optional axes to plot on
"""
if external_axes is None:
_, ax = plt.subplots(figsize=plot_autoscale(), dpi=PLOT_DPI)
else:
ax = external_axes[0]
ef, rets, stds = optimizer_model.generate_random_portfolios(
stocks, period, n_portfolios)
# The ef needs to be deep-copied to avoid error in plotting sharpe
ef2 = copy.deepcopy(ef)
sharpes = rets / stds
ax.scatter(stds, rets, marker=".", c=sharpes)
plotting.plot_efficient_frontier(ef, ax=ax, show_assets=False)
for ticker, ret, std in zip(ef.tickers, ef.expected_returns,
np.sqrt(np.diag(ef.cov_matrix))):
ax.scatter(std, ret, s=50, marker=".", c="w")
ax.annotate(ticker, (std * 1.01, ret))
# Find the tangency portfolio
rfrate = get_rf()
ef2.max_sharpe(risk_free_rate=rfrate)
ret_sharpe, std_sharpe, _ = ef2.portfolio_performance(
verbose=True, risk_free_rate=rfrate)
ax.scatter(std_sharpe,
ret_sharpe,
marker="*",
s=100,
c="r",
label="Max Sharpe")
# Add risk free line
if risk_free:
y = ret_sharpe * 1.2
b = get_rf()
m = (ret_sharpe - b) / std_sharpe
x2 = (y - b) / m
x = [0, x2]
y = [b, y]
line = Line2D(x, y, label="Capital Allocation Line")
ax.set_xlim(xmin=min(stds) * 0.8)
ax.add_line(line)
ax.set_title(f"Efficient Frontier simulating {n_portfolios} portfolios")
ax.legend(loc="best", scatterpoints=1)
theme.style_primary_axis(ax)
if external_axes is None:
theme.visualize_output()
#to get a grasp how our chosen portfolio correlates with each other asset in the portfolio we state a cov heatmap
plotting.plot_covariance(cov_matrix_tickers, plot_correlation=True)
##create the Efficient frontier line and visualize it
#in order to visualize the efficient frontier from the optimized portfolio, we need to initiate a new built-in method
#we use the CLA method, because it is more robust than the default option
cla = CLA(mu_target_tickers, cov_matrix_tickers)
if risk_tolerance == 'Low':
cla.min_volatility()
else:
cla.max_sharpe()
#plot the efficient frontier line
ax_portfolio = plotting.plot_efficient_frontier(cla,
ef_param='risk',
ef_param_range=np.linspace(
0.2, 0.6, 100),
points=1000)
#initialize Discrete Allocation to get a full picture what you could buy with a given amount
#the Discrete Allocation gives you the discrete amount of shares you have to allocate given your available funds
from pypfopt import DiscreteAllocation
from datetime import datetime
from datetime import timedelta
#create list out of sliced tickers dataframe
tickers_list = tickers.index.to_list()
#create a dictionary which can be used for the Discrete Allocation as an input
weight_pf = {}
values_pf = tickers['Weight']
def plot_ef(
stocks: List[str],
variance: float,
per_ret: float,
rf_rate: float,
period: str = "3mo",
n_portfolios: int = 300,
risk_free: bool = False,
):
"""Display efficient frontier
Parameters
----------
stocks : List[str]
List of the stocks to be included in the weights
variance : float
The variance for the portfolio
per_ret : float
The portfolio's return for the portfolio
rf_rate : float
The risk free rate
period : str
The period to track
n_portfolios : int
The number of portfolios to generate
risk_free : bool
Include the risk-free asset
"""
fig, ax = plt.subplots(figsize=(10, 5), dpi=PLOT_DPI)
ef, rets, stds = optimizer_model.generate_random_portfolios(
[x.upper() for x in stocks], period, n_portfolios)
sharpes = rets / stds
ax.scatter(stds, rets, marker=".", c=sharpes, cmap="viridis_r")
plotting.plot_efficient_frontier(ef, ax=ax, show_assets=True)
# Find the tangency portfolio
ret_sharpe, std_sharpe, _ = ef.portfolio_performance(
risk_free_rate=rf_rate)
ax.scatter(std_sharpe,
ret_sharpe,
marker="*",
s=100,
c="r",
label="Max Sharpe")
plt.plot(variance, per_ret, "ro", label="Portfolio")
# Add risk free line
if risk_free:
y = ret_sharpe * 1.2
m = (ret_sharpe - rf_rate) / std_sharpe
x2 = (y - rf_rate) / m
x = [0, x2]
y = [rf_rate, y]
line = Line2D(x, y, color="#FF0000", label="Capital Allocation Line")
ax.set_xlim(xmin=min(stds) * 0.8)
ax.add_line(line)
ax.set_title(f"Efficient Frontier simulating {n_portfolios} portfolios")
ax.legend()
fig.tight_layout()
ax.grid(b=True, which="major", color="#666666", linestyle="-")
if gtff.USE_ION:
plt.ion()
imgdata = BytesIO()
fig.savefig(imgdata, format="png")
plt.close("all")
imgdata.seek(0)
return ImageReader(imgdata)
