def _calculate_rent_baseline(monthly_rents, occupancy, month_in_year=12):
'''Computes baseline annual revenue from total monthly rents including occupancy assumption.'''
assert is_decimal(monthly_rents)
assert is_decimal(occupancy)
assert 1 <= month_in_year <= 12
return monthly_rents * month_in_year * occupancy
def _list_of_coupon_irr(list_of_nois, return_factor, return_coefficient):
'''Calculate list of Coupon IRRs for deal list.'''
assert is_list_of_decimals(list_of_nois)
assert is_decimal(return_factor)
assert is_decimal(return_coefficient)
return [(noi * return_factor) + return_coefficient for noi in list_of_nois]
def _list_of_surplus(list_of_nois, return_factor, return_coefficient, target_irr):
'''Calculate List of surplus for deal list.'''
assert is_list_of_decimals(list_of_nois)
assert is_decimal(return_factor)
assert is_decimal(return_coefficient)
assert is_decimal(target_irr)
return [(noi * return_factor) + return_coefficient - target_irr for noi in list_of_nois]
def _list_of_gross_yield(list_of_deals, base_rents):
'''Calculate List of gross yields.'''
assert is_list_of_decimals(list_of_deals)
assert is_decimal(base_rents)
return [(base_rents / deal) if deal != 0 else None
for deal in list_of_deals]
def _list_of_irr(list_of_coupons, hpa_factor):
'''Calculate list of IRRs for deal list.'''
assert is_list_of_decimals(list_of_coupons)
assert is_decimal(hpa_factor)
return [(coupon + hpa_factor - decimal.Decimal(1.0))
for coupon in list_of_coupons]
def _list_of_deal_value(list_of_ratios, total_value):
'''Calculate List of dollar values for deals given ratios and total valuation.'''
assert is_list_of_decimals(list_of_ratios)
assert is_decimal(total_value)
if total_value == 0:
return []
return [(ratio * total_value) for ratio in list_of_ratios]
def _list_of_deal_value(list_of_ratios, total_value):
'''Calculate List of dollar values for deals given ratios and total valuation.'''
assert is_list_of_decimals(list_of_ratios)
assert is_decimal(total_value)
if total_value == 0:
return []
return [(ratio * total_value) for ratio in list_of_ratios]
def _list_of_premium(list_of_deal_values, total_value):
'''Calculate List of fractional premium (negative for discount) relative to total deal value.'''
assert is_list_of_decimals(list_of_deal_values)
assert is_decimal(total_value)
if total_value == 0:
return []
return [(deal_value/total_value) - decimal.Decimal(1.0) for deal_value in list_of_deal_values]
def _list_of_premium(list_of_deal_values, total_value):
'''Calculate List of fractional premium (negative for discount) relative to total deal value.'''
assert is_list_of_decimals(list_of_deal_values)
assert is_decimal(total_value)
if total_value == 0:
return []
return [(deal_value / total_value) - decimal.Decimal(1.0)
for deal_value in list_of_deal_values]
def _list_of_profit(list_of_deals, baseline):
'''Calculate List of dollar profit versus baseline.'''
assert is_list_of_decimals(list_of_deals)
assert is_decimal(baseline)
return [(baseline - deal_value) for deal_value in list_of_deals]
def _bips_over(bips):
'''Basis points over 100%.'''
assert is_decimal(bips)
return 1 + bips / decimal.Decimal(10000.0)
def _calculate_occupancy(current_leases, units):
'''Computes occupancy from total lease revenue and number of units.'''
assert is_decimal(current_leases)
assert is_decimal(units)
return current_leases / units if units != 0 else 0
def _list_of_irr(list_of_coupons, hpa_factor):
'''Calculate list of IRRs for deal list.'''
assert is_list_of_decimals(list_of_coupons)
assert is_decimal(hpa_factor)
return [(coupon + hpa_factor - decimal.Decimal(1.0)) for coupon in list_of_coupons]
def _bips_over(bips):
'''Basis points over 100%.'''
assert is_decimal(bips)
return 1 + bips / decimal.Decimal(10000.0)
def _list_of_noi(list_of_yields, noi_percent):
'''Calculate List of Net Operating Incomes given yields for each deal and NOI percent.'''
assert is_list_of_decimals(list_of_yields)
assert is_decimal(noi_percent)
return [(deal_yield * noi_percent) for deal_yield in list_of_yields]
def _list_of_gross_yield(list_of_deals, base_rents):
'''Calculate List of gross yields.'''
assert is_list_of_decimals(list_of_deals)
assert is_decimal(base_rents)
return [(base_rents / deal) if deal != 0 else None for deal in list_of_deals]
def _list_of_profit(list_of_deals, baseline):
'''Calculate List of dollar profit versus baseline.'''
assert is_list_of_decimals(list_of_deals)
assert is_decimal(baseline)
return [(baseline - deal_value) for deal_value in list_of_deals]
def _list_of_noi(list_of_yields, noi_percent):
'''Calculate List of Net Operating Incomes given yields for each deal and NOI percent.'''
assert is_list_of_decimals(list_of_yields)
assert is_decimal(noi_percent)
return [(deal_yield * noi_percent) for deal_yield in list_of_yields]
def _calculate_occupancy(current_leases, units):
'''Computes occupancy from total lease revenue and number of units.'''
assert is_decimal(current_leases)
assert is_decimal(units)
return current_leases / units if units != 0 else 0
