Draft
Evaluation of equity-based debt obligations
Alexander Fromm
University of Jena CMS-MMEI-2019, TU Chemnitz- 28. March 2019
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Draft Evaluation of equity-based debt obligations Alexander Fromm University of Jena CMS-MMEI-2019, TU Chemnitz 28. March 2019 1 / 18 Table of Contents Draft The Problem 1 EbDOs 2 Discrete time model 3 Continuous time model 4 2 / 18
Evaluation of equity-based debt obligations
Alexander Fromm
University of Jena CMS-MMEI-2019, TU ChemnitzTable of Contents
1The Problem
2EbDOs
3Discrete time model
4Continuous time model
2 / 18Participation rights
Assume a company wants to obtain goods, services, money, information, software or other assets which are of value for or are needed by the company from a given investor in return for a certain share of future profits.
3 / 18Participation rights
Assume a company wants to obtain goods, services, money, information, software or other assets which are of value for or are needed by the company from a given investor in return for a certain share of future profits. Fundamental question: What does ”share of future profits” mean exactly?
3 / 18Participation rights
Assume a company wants to obtain goods, services, money, information, software or other assets which are of value for or are needed by the company from a given investor in return for a certain share of future profits. Fundamental question: What does ”share of future profits” mean exactly? There is a whole spectrum of different arrangements depending
is to the company’s equity (e.g. common shares) or to fixed income debt (e.g. bonds). Mezzanine capital
3 / 18What do we expect from a good investment vehicle?
Predictability: Being able to tell in advance how much the investor will get depending on the performance of the company, but also when he/she will get it.
4 / 18What do we expect from a good investment vehicle?
Predictability: Being able to tell in advance how much the investor will get depending on the performance of the company, but also when he/she will get it. Good incentives: Investor and company should be all in the same boat in terms of profits, s.t. investors cannot benefit at the expense of the company and vice versa. This is especially important if executives are compensated with participation rights.
4 / 18What do we expect from a good investment vehicle?
Predictability: Being able to tell in advance how much the investor will get depending on the performance of the company, but also when he/she will get it. Good incentives: Investor and company should be all in the same boat in terms of profits, s.t. investors cannot benefit at the expense of the company and vice versa. This is especially important if executives are compensated with participation rights. Flexibility: Tailor made conditions in order to fit a given investor, e.g. in terms of maturity, minimal or maximal pay-off etc.
4 / 18What do we expect from a good investment vehicle?
Predictability: Being able to tell in advance how much the investor will get depending on the performance of the company, but also when he/she will get it. Good incentives: Investor and company should be all in the same boat in terms of profits, s.t. investors cannot benefit at the expense of the company and vice versa. This is especially important if executives are compensated with participation rights. Flexibility: Tailor made conditions in order to fit a given investor, e.g. in terms of maturity, minimal or maximal pay-off etc. Easy issuance: Issuance by the management subject to simple criteria without necessary approval by other investors (including shareholders).
4 / 18What do we expect from a good investment vehicle?
Invariance w.r.t. jurisdiction: The nature of the legal arrangement should not depend on the legal system or current legislation.
5 / 18What do we expect from a good investment vehicle?
Invariance w.r.t. jurisdiction: The nature of the legal arrangement should not depend on the legal system or current legislation. Tax efficiency: The company’s estimated debt from participation rights should be tax deductible. lower corporate taxes
5 / 18What do we expect from a good investment vehicle?
Invariance w.r.t. jurisdiction: The nature of the legal arrangement should not depend on the legal system or current legislation. Tax efficiency: The company’s estimated debt from participation rights should be tax deductible. lower corporate taxes Neutrality in terms of corporate governance: Issuance of new participation rights should not have an effect on existing corporate architecture and how (and by whom) control is
commitment to maximize long term profits.
5 / 18Definition
In the following, we use the term Equity-Based Debt Obligation (EbDO) for an arrangement according to which a company pays h(YT) to an investor, where T is the maturity, i.e. time of payment, YT is the company’s equity (= assets - all debts) at time T, h is the pay-off-function, which must be monotonically increasing and non-negative. W.l.o.g. we assume h(0) = 0. For practical purposes it is sufficient to consider h which are piecewise linear and continuous.
6 / 18Example
Assume the company has issued only one EbDO, which matures now, i.e. T = 0, the equity without the EbDO would have been some value X0 > 0, h(y) := α · y, where α > 0. Then: Y0 = X0 − h(Y0) = X0 − αY0,
7 / 18Example
Assume the company has issued only one EbDO, which matures now, i.e. T = 0, the equity without the EbDO would have been some value X0 > 0, h(y) := α · y, where α > 0. Then: Y0 = X0 − h(Y0) = X0 − αY0, which results in Y0 =
X0 1+α. 7 / 18Example
Assume the company has issued only one EbDO, which matures now, i.e. T = 0, the equity without the EbDO would have been some value X0 > 0, h(y) := α · y, where α > 0. Then: Y0 = X0 − h(Y0) = X0 − αY0, which results in Y0 =
X0 1+α.Furthermore: h(Y0) = X0 ·
α 1+α. 7 / 18Example
Assume the company has issued only one EbDO, which matures now, i.e. T = 0, the equity without the EbDO would have been some value X0 > 0, h(y) := α · y, where α > 0. Then: Y0 = X0 − h(Y0) = X0 − αY0, which results in Y0 =
X0 1+α.Furthermore: h(Y0) = X0 ·
α 1+α.In other words, the total money X0 is divided between the investor and the company with the ratio α : 1, where Y0 =
X0 1+αis the money, which remains with the company after the pay-off.
7 / 18Example
Assume the company has issued only one EbDO, which matures now, i.e. T = 0, the equity without the EbDO would have been some value X0 > 0, h(y) := α · y, where α > 0. Then: Y0 = X0 − h(Y0) = X0 − αY0, which results in Y0 =
X0 1+α.Furthermore: h(Y0) = X0 ·
α 1+α.In other words, the total money X0 is divided between the investor and the company with the ratio α : 1, where Y0 =
X0 1+αis the money, which remains with the company after the pay-off. However, a more typical pay-off function is h(y) := α · (y − r)+, where r > 0 is some reference value, e.g. the company’s (past) equity at the moment the EbDO was issued.
7 / 18Properties
EbDOs Common Shares Predictability
Incentives
Flexibility
Invariance
Tax efficiency
Simple issuance
Neutrality
Fundamental Problem
Given the current equity before EbDO-debt X0 and n EbDOs h1(YT1), h2(YT2), . . . , hn(YTn), with non-negative maturities 0 ≤ T1 < T2 < . . . < Tn, calculate the current equity Y0, as well as the current fair value of every of the n EbDOs.
9 / 18Fundamental Problem
Given the current equity before EbDO-debt X0 and n EbDOs h1(YT1), h2(YT2), . . . , hn(YTn), with non-negative maturities 0 ≤ T1 < T2 < . . . < Tn, calculate the current equity Y0, as well as the current fair value of every of the n EbDOs. Furthermore, these calculations should be based on reasonable assumptions about the future evolution of X and Y, which is subject of uncertainty.
9 / 18First Case
Assume an EbDO matures right now, i.e. at time 0: Y0 = X0 − h(Y0)
10 / 18First Case
Assume an EbDO matures right now, i.e. at time 0: Y0 = X0 − h(Y0) ⇐ ⇒ Y0 = (Id + h)−1(X0). Furthermore: h(Y0) = h ◦ (Id + h)−1(X0).
10 / 18First Case
Assume an EbDO matures right now, i.e. at time 0: Y0 = X0 − h(Y0) ⇐ ⇒ Y0 = (Id + h)−1(X0). Furthermore: h(Y0) = h ◦ (Id + h)−1(X0). If we have several, e.g. two, EbDOs, given by h and g maturing at time 0, the total pay-off is (h + g)(Y0) and we have a reduction to the previous situation: Y0 = (Id + h + g)−1(X0), h(Y0) = h ◦ (Id + h + g)−1(X0), g(Y0) = g ◦ (Id + h + g)−1(X0)
10 / 18Second Case
Assume T > 0 and we have only one EbDO given by h(YT). Again, only X0 is known. We postulate Xt = X0 + t
0 µXs ds +t
0 σXs dWs for t ∈ [0, T]: 11 / 18Second Case
Assume T > 0 and we have only one EbDO given by h(YT). Again, only X0 is known. We postulate Xt = X0 + t
0 µXs ds +t
0 σXs dWs for t ∈ [0, T]:XT = X0 · Z, where Z ∼ LN
2σ2
µ reflects how quickly assets inside the company grow (per unit
Second Case
Assume T > 0 and we have only one EbDO given by h(YT). Again, only X0 is known. We postulate Xt = X0 + t
0 µXs ds +t
0 σXs dWs for t ∈ [0, T]:XT = X0 · Z, where Z ∼ LN
2σ2
µ reflects how quickly assets inside the company grow (per unit
If there is no inflation or deflation µ = 0 should be set for book-keeping purposes.
11 / 18Second Case
Assume T > 0 and we have only one EbDO given by h(YT). Again, only X0 is known. We postulate Xt = X0 + t
0 µXs ds +t
0 σXs dWs for t ∈ [0, T]:XT = X0 · Z, where Z ∼ LN
2σ2
µ reflects how quickly assets inside the company grow (per unit
If there is no inflation or deflation µ = 0 should be set for book-keeping purposes. We get: YT = (Id + h)−1(XT) , h(YT) = h ◦ (Id + h)−1(XT),
11 / 18Second Case
Assume T > 0 and we have only one EbDO given by h(YT). Again, only X0 is known. We postulate Xt = X0 + t
0 µXs ds +t
0 σXs dWs for t ∈ [0, T]:XT = X0 · Z, where Z ∼ LN
2σ2
µ reflects how quickly assets inside the company grow (per unit
If there is no inflation or deflation µ = 0 should be set for book-keeping purposes. We get: YT = (Id + h)−1(XT) , h(YT) = h ◦ (Id + h)−1(XT), Y0 = E
Third Case
We have two EbDOs given by g(Y0) and h(YT), where T > 0. Again, X0 is known. To model XT, first define X ′
0 as thecompany’s net assets after paying out g(Y0), but before h(YT). This value is unknown, however: XT := X ′
0 · Z, where Z ∼ LN2σ2
Third Case
We have two EbDOs given by g(Y0) and h(YT), where T > 0. Again, X0 is known. To model XT, first define X ′
0 as thecompany’s net assets after paying out g(Y0), but before h(YT). This value is unknown, however: XT := X ′
0 · Z, where Z ∼ LN2σ2
We get: Y0 = E
Furthermore: X ′
0 = X0−g(Y0) 12 / 18Third Case
We have two EbDOs given by g(Y0) and h(YT), where T > 0. Again, X0 is known. To model XT, first define X ′
0 as thecompany’s net assets after paying out g(Y0), but before h(YT). This value is unknown, however: XT := X ′
0 · Z, where Z ∼ LN2σ2
We get: Y0 = E
Furthermore: X ′
0 = X0−g(Y0) ⇒ f −1(Y0) = X0−g(Y0) 12 / 18Third Case
We have two EbDOs given by g(Y0) and h(YT), where T > 0. Again, X0 is known. To model XT, first define X ′
0 as thecompany’s net assets after paying out g(Y0), but before h(YT). This value is unknown, however: XT := X ′
0 · Z, where Z ∼ LN2σ2
We get: Y0 = E
Furthermore: X ′
0 = X0−g(Y0) ⇒ f −1(Y0) = X0−g(Y0) ⇒ Y0 = (f −1 + g)−1(X0) 12 / 18General Case
We have n EbDOs hi(YTi) with increasing Ti and T1 = 0. Let us now write Yi instead of YTi for short etc. Again, define X ′
i as the net assets after paying out the first iEbDOs, but before subtracting the others.
13 / 18General Case
We have n EbDOs hi(YTi) with increasing Ti and T1 = 0. Let us now write Yi instead of YTi for short etc. Again, define X ′
i as the net assets after paying out the first iEbDOs, but before subtracting the others. Also, define Xi = X ′
i + hi(Yi) ≥ X ′ i . Now write Xi+1 = X ′ i · Zi,where Zi has a log-normal distribution.
13 / 18General Case
We have n EbDOs hi(YTi) with increasing Ti and T1 = 0. Let us now write Yi instead of YTi for short etc. Again, define X ′
i as the net assets after paying out the first iEbDOs, but before subtracting the others. Also, define Xi = X ′
i + hi(Yi) ≥ X ′ i . Now write Xi+1 = X ′ i · Zi,where Zi has a log-normal distribution. We define fn−1(X ′
n−1) := En−1which we use to get Yn−1 = (f −1
n−1 + hn−1)−1(Xn−1) 13 / 18General Case
We have n EbDOs hi(YTi) with increasing Ti and T1 = 0. Let us now write Yi instead of YTi for short etc. Again, define X ′
i as the net assets after paying out the first iEbDOs, but before subtracting the others. Also, define Xi = X ′
i + hi(Yi) ≥ X ′ i . Now write Xi+1 = X ′ i · Zi,where Zi has a log-normal distribution. We define fn−1(X ′
n−1) := En−1which we use to get Yn−1 = (f −1
n−1 + hn−1)−1(Xn−1) and, therefore,Yn−2 = En−2
Similarly, construct fn−3 from fn−2 etc. Finally, we obtain Y0 = (f −1
1+ h1)−1(X0).
13 / 18General Case
To sum up, we have constructed non-negative random variables Xi, Yi, X ′
i , i = 0, . . . , n, satisfying: 1 (Xi), (X ′ i ), (Yi) are adapted w.r.t. (Fi)i∈{0,...,n}, 2 Xi = X ′ i−1 · Zi a.s. for all i ∈ {1, . . . , n}, 3 X ′ i = Xi − hi(Yi) a.s. for all i ∈ {1, . . . , n}, 4 (Yi)i∈{0,...,n} is a martingale w.r.t. (Fi)i∈{0,...,n}, 5 Yn = X ′ n a.s. and X ′ 0 = X0, where X0 ∈ [0, ∞) is given. 14 / 18General Case
To sum up, we have constructed non-negative random variables Xi, Yi, X ′
i , i = 0, . . . , n, satisfying: 1 (Xi), (X ′ i ), (Yi) are adapted w.r.t. (Fi)i∈{0,...,n}, 2 Xi = X ′ i−1 · Zi a.s. for all i ∈ {1, . . . , n}, 3 X ′ i = Xi − hi(Yi) a.s. for all i ∈ {1, . . . , n}, 4 (Yi)i∈{0,...,n} is a martingale w.r.t. (Fi)i∈{0,...,n}, 5 Yn = X ′ n a.s. and X ′ 0 = X0, where X0 ∈ [0, ∞) is given.The filtration (Fi)i∈{0,...,n} is generated by independent Zi ∼ LN
2σ2
i = 1, . . . , n.
14 / 18Pros and Cons
Advantages: straight-forward numerics processes X, X ′, Y can be simulated using XTi = X ′
Ti + hi(YTi) and YTi = (f −1 i+ hi)−1(XTi) → get all expected pay-offs using Monte-Carlo-simulation We can simulate with a different µ than 0. → Investors can calculate how much they will get depending on their profitability assumptions.
15 / 18Pros and Cons
Advantages: straight-forward numerics processes X, X ′, Y can be simulated using XTi = X ′
Ti + hi(YTi) and YTi = (f −1 i+ hi)−1(XTi) → get all expected pay-offs using Monte-Carlo-simulation We can simulate with a different µ than 0. → Investors can calculate how much they will get depending on their profitability assumptions. Disadvantages: possibly slow calculation for large number of maturities All performance-based debt must be modelled via EbDOs.
15 / 18Continuous time model
Assume we have so many different EbDOs that they effectively mature continuously in time with a certain rate function h : [0, T] × [0, ∞) → [0, ∞). Then, we may assume that X, Y satisfy Xs = X0− s h(r, Yr) dr + s Xr · σ dWr Ys = XT − T
sZr dWr, s ∈ [0, T]
16 / 18Continuous time model
Assume we have so many different EbDOs that they effectively mature continuously in time with a certain rate function h : [0, T] × [0, ∞) → [0, ∞). Then, we may assume that X, Y satisfy Xs = X0− s h(r, Yr) dr + s Xr · σ dWr Ys = XT − T
sZr dWr, s ∈ [0, T] Under the condition
d dy h(·, ·) ≥ 0 the well-posedness of theabove FBSDE can be shown using the method of decoupling fields.
16 / 18Continuous time model
Assume that h is uniformly Lipschitz continuous in y such that h(·, 0) = 0.
17 / 18Continuous time model
Assume that h is uniformly Lipschitz continuous in y such that h(·, 0) = 0. Theorem For all X0 ≥ 0 the FBSDE has a unique square integrable solution (X, Y, Z) and we have 0 ≤ Y ≤ X.
17 / 18Continuous time model
Assume that h is uniformly Lipschitz continuous in y such that h(·, 0) = 0. Theorem For all X0 ≥ 0 the FBSDE has a unique square integrable solution (X, Y, Z) and we have 0 ≤ Y ≤ X. Moreover, there exists a decoupling field u : [0, T] × [0, ∞) → [0, ∞) s.t. u(s, Xs) = Ys and s.t.: u(s, ·) is Lipschitz continuous uniformly in s, u(s, 0) = 0 and u(s, ·) is monotonically increasing for every s.
17 / 18Continuous time model
Assume that h is uniformly Lipschitz continuous in y such that h(·, 0) = 0. Theorem For all X0 ≥ 0 the FBSDE has a unique square integrable solution (X, Y, Z) and we have 0 ≤ Y ≤ X. Moreover, there exists a decoupling field u : [0, T] × [0, ∞) → [0, ∞) s.t. u(s, Xs) = Ys and s.t.: u(s, ·) is Lipschitz continuous uniformly in s, u(s, 0) = 0 and u(s, ·) is monotonically increasing for every s. Once u is obtained we can simulate the whole system and calculate all expectations (also w.r.t. non-martingale measures).
17 / 18Pros and Cons
Advantages: existing theory to show existence and uniqueness FBSDEs are a highly flexible modelling tool:
it is easy to include other performance-based debt, e.g. assume that h depends on X as well, we are not bound to GBM-type dynamics, i.e. may assume that σ is a function of X, Y etc., may even model complex multi-dimensional scenarios where several companies hold EbDOs of each other etc. 18 / 18Pros and Cons
Advantages: existing theory to show existence and uniqueness FBSDEs are a highly flexible modelling tool:
it is easy to include other performance-based debt, e.g. assume that h depends on X as well, we are not bound to GBM-type dynamics, i.e. may assume that σ is a function of X, Y etc., may even model complex multi-dimensional scenarios where several companies hold EbDOs of each other etc.Disadvantages: have to replace/approximate classic EbDOs with EbDOs which ”mature” gradually over time with some rate, need fast and easy to use numerical methods for coupled FBSDEs: e.g. automatic choice of discretization, ”black-box” type algorithm/package.
18 / 18