I hardly play EVE anymore, and I am not a trader, but I understand a thing or two about economics.
First, the statements CCP are making in their own devblog are contradictory. On the one hand, you want to mirror real-world markets, on the other you are committed to prevent bots. Bots or automated trading systems are part of financial and commodities markets in the real world, and everything traded in EVE is a commodity (with the exception of abyssal modules). So what you are committed to is not aligned with real-world markets.
Second, granted that you want every activity to be PVP rather than PVA (player versus automaton), your goal is to suppress bots. The changes you are proposing include:
- Four significant digits to market orders,
- Relist fees (or an increase thereof),
- Elimination/conversion of the margin trading skill in favor of a relist fee skill.
The first two changes are sufficient to assure that market PVP is indeed player versus player. Trading would become less stressful for those who actually trade in person rather than by bot. A higher relist fee will assure that the constant undercutting stops, and the four significant digits should mean that traders set the same price (if relisting is sufficiently expensive), which makes sense given that all items are commodities. However, there are ways to improve on that system: the first is to only charge a relist fee if the seller is trying to set a price lower than the cheapest standing order (if s/he is not the only seller). The reason for doing so is this: If a seller sets a price of, say, 110,000,000 a new seller might come in at 109,900,000, and the older seller might find it prohibitively expensive to relist because of the relist fee. Creating this kind of market friction is certainly not what you have in mind. By charging a relist fee only if the relist price is below the lowest standing sell order would allow the first seller to match without the .01 (or in this case 100000 ISK) undercutting nonsense. Only the nonsense gets penalized.
The second is to draw the seller at random from or to sell in proportion of those sellers who offer the same lowest price. Say A and B both offer an X-type whatever at 350 M and are the cheapest sellers. Customer C wants to buy one unit. In this case, draw the seller at random between A and B. Say A and B are the cheapest sellers and want to sell 10000 and 5000 units, respectively, of Mercoxit at 7000 ISK per unit. Customer C wants to buy 6000 units. Sell 2/3, i.e. 4000 units, from A, and 1/3, i.e. 2000 units, from B.
There is no need to eliminate the margin trading skill to implement the change above. Letâs assume the change of the margin trading skill is implemented to kill margin trading scams instead. The elimination of the skill, however, pours out the baby with the bathwater and might do more harm than good to the economic system. The positive aspect of margin trading is that it increases the liquidity in the market because there are more buy orders out there. It is similar to credit and helps both the traders (to make more volume) as well as the small guys (who find it easier to sell one way or another). If you want to get rid of margin trading scams, you could just ban it (i.e., make it unlawful), rather than ban it by design because that incurs other negative consequences for the economy. Another way of trying to address it is to put a limit on wallet transfers in a such a way that prohibits a characterâs wallet from containing less ISK than his or her most expensive buy order at any given time. It is like a minimum upkeep/safety in futures trading.