The terms **Stake**, **Yield** (Revenue) and **ROI** (Return on Investment) confuse many people. We have also noticed many online publications using these terms incorrectly.

*This article is therefore a definitive guide to put the record straight…*

## Stake

The sum of money gambled on the outcome of an event. The amount of money played with, or placed as a bet.

In the online world of gambling, stakes are electronically placed on a desired outcome with another party that has agreed to accept your stake, whether this be a bookmaker or an anonymous person/group in a betting exchange.

These ‘adversaries’ are effectively backing with their own money against your selection, hoping to make a profit of your stake if your selection in the event turns out to be wrong.

Once the outcome of the event is decided, stakes are returned to you in full if your bet has won (plus the winnings), or, if you lose the bet, the stake is lost and either retained by the bookmaker, or transferred to the winning side in the betting exchange.

Technically speaking, **stakes are guarantees**! This means that they are short-term deposit payments to guarantee that the losing party can and will honour his debt obligation to the winner of the bet.

## Yield

The Profit/Loss*ratio^{†}applied to the total capital employed (total staked)

**This is Profit or Loss, NOT Profit divided by Loss*

^{†}ratio = the quantitative relation between two amounts showing the number of times one value contains or is contained within the other.

Literally translated, the term **YIELD** means profit, earnings, harvest, income, revenue…

**When applied to gambling, Yield measures betting efficiency compared to total turnover**.

If your aversion to risk is low, you will select bets with higher probabilities. Bets with higher probabilities of winning carry lower odds. Lower odds means a smaller yield.

If you enjoy higher risk strategies, the opposite will apply.

Generally speaking and depending upon the strategy employed, a good bettor will yield between 5 and 10 percent profit in the long run.

In football betting any yield over 7% is considered to be a very good result.

Yield Formula:

PL divided by ∑MS(written as a percentage):PL =

profit/loss(MW minus ML = net profit or loss); equivalent to your bank growth

∑ =the sum of

MS =money staked

MW =money won(purely winnings; returned stakes are ‘neutral’, not winnings)

ML =money lost(stakes lost)

**Example #1: YIELD***A bettor places 38 bets with stakes of 20 units each. The total amount staked [Capital Employed] is 760 units (38 x 20). 33 of the bets win and 5 of the bets lose; the net result [Profit] is a bank growth of 65 units.*

Yield in this example is **8.55%**

We come across many forum threads with people talking about their betting strategies; It is also easy to find plenty of websites offering betting systems for sale.

What many of them have in common is claims of high yield results, probably intended to impress the reader.

If they are to be believed then this is an indication of high risk strategies employed.

It must be remembered that in the Yield formula, the sum of money staked (∑MS) includes all stakes, even those that have not been lost. (In other words, the refunded ‘guarantees’).

People tend not to understand this fully and as a result mistakenly overstate their yield results.

Yield is NOT the same as ROI (Return on Investment)!

## Return on Investment (ROI):

The ratio of money gained or lost on an investment relative to the amount of money invested. In other words, the profit/loss ratio as a function*for investment^{†}(capital employed).

**function = a relation or expression involving one or more variables; in this case, investment, profit, loss.*

^{†}investment = long-term employment of tangible, financial, or other assets that are not meant for immediate gains but are intended to generate benefits (normally earnings or profits) in the future.

**ROI** is also known as ‘rate of profit’ or sometimes just ‘return’.

ROI Formula:

If you bet systematically, your starting capital will be turned over again and again: It is effectively the same money you are investing. (So long as you don’t lose every bet!).

The ROI formula resembles the yield formula, but here, profit/loss is related to the actual investment (starting bank) instead of the total of all stakes (turnover).

For a more accurate ROI calculation, in an ideal world, you should also factor in to the investment all other costs of ‘**setting up** the business’. For example, hardware/software costs (computers). However, we will leave this out of our calculations for the time being for the sake of simplicity; you can always include these costs once you have mastered the concept. 😉

**Example #2: ROI***Returning to our previous illustration, 38 bets were placed, each with a stake of 20 units (760 units staked in total). 5 bets lost but the overall bank growth was 65 units. Let’s assume the starting bank [investment] was 200 units.*

ROI in this example is **32.5%**

ROI is always calculated for a certain predetermined amount of time; in finances usually for one whole year, but it is also common and acceptable to calculate the ROI monthly or, in a betting sense, for only the number of bets within a specific time scale.

The return on investment index is especially suitable when the amount of capital has a strong influence on the result (e.g. with arbitrage).

However, this is probably rarely the case for the majority of punters. Therefore, it is the next formula, **profitability**, which is the * most important* one for the normal bettor.

Hi,

Remains one question.

If you are just starting and in 10 bets you hit all 10 you can’t devide by 0. So how do you calculate your profitability in this case? Of course you just need to loose one to be able to devide and that will happen sooner or later but till then how do you calculate it?

Hi Hugo,

this is a very theoretical question… if you can’t divide by 0 then divide by 0.000001 😉

Thanks soccer window for a great article on yields over betting exchanges. Just to understand some concepts.

Suppose that these are the odds for 10 bets with a stake of 100 unit each with strike rate of 7 and lost of 3.

1.23, 1.44, 1.55, 1.34, 1.47, 1.60, 1.28, 1.50, 1.36, 1.27

Do we take average like above is 1.404 and work out money won as:

MW = (10 * 1.404 * 100). – (7 * 100) = 704

ML = (3 * 100) = 300

PL = 704 – 300 = 404

Yield = 404/10 = 40.4%

Or do we Sum all odds with their stake? Example

MW = (1.23*100) + (1.44*100) +(1.55*100)+( 134*100)+( 1.47*100)+(1.60*100)+( 1.28*100)+( 1.50*)+( 1.36*100)+(1.27 *100) = 1404

Hi Dalan,

both work…

Your first calculation: Yield = 40.4%

Your second calculation… a little bit continued..

1,404 / 1000 (total staked) = 1.404

1.404 minus 1 = 0.404 = 40.4 % Yield

Hi Soccerwidow,

Sorry as this will sound a very silly question. For record-keeping purposes, I’m a bit sure how to proceed on this.

If you’re using betting exchange, should you factor in the commission fee into the Money Won calculation?

E.g. I think Betfair take 5% commission.

Just using the unaltered yield formula. Let’s say one were to place 40 bets with stakes of 100 units each and with average market odds of 1.50. Let’s suppose that 32 bets hit, and 8 bets miss (although I fear such a great yield may be wishful thinking).

Using the theory, it should look like

Money Won= (32 * 100 * 1.50) – (32 * 100)

= 4800 – 3200

=1600

Money Lost= 8 * 100

=800

So PL = 800

And Money Stake

So that’s a total money staked = 4000.

Yield = PL/MS

=800/4000

=0.20

=20%

But if we include a commission fee of 95%, Money Won should surely be:

MW= (((32 * 100 * 1.50) – (32 * 100)) * 0.95)

should it not?

I’m just wondering when most people talk of Money Won and Yield, are they taking out the commission fee? It gives us a difference in yield of 18% compared to 20%

Sorry for such a long and dumb question.

Kind regards,

Audiendi

Hi Audiendi,

yes, you have to factor in the 5% commission fee of Betfair; Germans have to factor in the gambling tax, etc. etc.

You’ve calculated right and I’m going to repeat your example, including the BF commission, for the sake of other readers:

40 bets with stakes of 100 units each, average market odds of 1.50; let’s suppose that 32 bets hit, and 8 bets missMoney Won= (32 * 100 * 1.50) – (32 * 100)

= 4,800 – 3,200

=1,600 – Commission 5%: 80

= 1,520

Money Lost= 8 * 100

=800

PL = 1,520 – 800 = 720

Total money staked = 4000

Yield = PL/MS

=720/4000

=0.18

=18%

I’ll write an article on that topic one day but currently I’m incredibly busy getting the German Over/Under course finished and in print.

Have a great Easter and help us to spread the word that we currently have an Easter sales running!

Thank you,

Elena

Cheers Elena,

Happy Easter to you and the family.

Kind regards,

Audiendi

Hey Guys,

Do you mean initially the bank was 200 units (perhaps 10 bets of 20 units were initially placed?). The bettor (presumably) collected profits from those first 10 bets. The bettor then made more bets so from the winnings so that, in total 760 units ended up being staked (a total of 38 bets of 20 units)?

I just couldn’t quite follow 760 units were staked (38 bets of 20 units) yet how can there be a starting bank of 200 units?

Kind regards,

Audiendi

Hi Audiendi,

the starting bank of 200 units is an assumption based on The Science of Calculating Winning and Losing Streaks.

Further, this example is based on a low risk strategy

(38 bets in total, 33 win: 86.8% hit rate; odds: 1.25)and, the example is based on the assumption that the bettor doesn’t place all 38 bets at the same time. Should that be the case then, of course, 200 units’ starting bank wouldn’t be enough.So, say… starting bank 200 units… placing 10 bets in total

(20 units each)… after these 10 bets your bank will be (depending on winning/losing) somewhere in the region of 140 units(if you were very unlucky, and 3 bets lost in the first betting round)up to 250 units(if all bets won). Then you can turn-over your bank again… and again… and again… That is why you get different numbers for turnover (Yield) and starting bank (ROI).Wrong. You have ROI and yield backwards. ROI is calculated as profit / total units wagered.

Hi JT,

I don’t have it wrong. The explained definitions are definitions from the financial world applied to sports betting. Look up Wiki, Investopedia, and so on… not forums!

Hi! Do you have any plans to release any more courses?

Hello John,

There is a 1×2 course in the pipeline, but I’m afraid I cannot be specific about the time scale for its release.

Apologies for the uncertainty.

What a great article! Thanks to you guys I’m currently taking a statistics course to learn more about how this all works. Can’t wait for your new value calculator to come out!