While there's certainly a lot of truth in what you say, you do make it all sound so formulaic. The analysis is never so simple, and neither is picking winners and losers.
I think you're picturing me as describing a methodology of betting on a future target price, which I'm not. I'm talking purely about business valuation, irrespective of market activity. Business valuation in the real world (not "professional stock pickers" or market analysts but business, M&A consultants, and the like) is more conservative than typical market activity.... but it's also a triangulation of several things that I couldn't boil down to one formula.
But for the wary investor, this is where the concept of margin of safety comes in. The less certainty there is depending on the factors playing into your analysis, you pick a margin of safety to offset that... So if you have a fairly weak analysis that says enterprise value is X, then seek an acquisition price at 10%, 20%, 30% discount to that X metric... and limit your share volume as well.
The markets abhor a system.
Business analysis is not a "system" in the sense of gaming the markets... What I'm talking about is finding a dollar worth of assets that the market prices at 60 cents. And then doing it again, and again, and again, and amassing a portfolio of securities you acquired at a substantial discount to working capital. What you do with it from there is up to you, but more often than not, if you've done your homework you know how working capital, a competitive moat and soundness of management tick and tie together to produce consistently positive operating cash flows. It's not magic. It's like weight loss. If you spend more calories than you consume, you will lose weight. If you spend more money than you make, you will lose money.
While there are exceptions, the tendency on securities you've acquired at or below their working capital plus forward cash flows is that they recede less in times of market distress (due to the lack of market hype) and advance moderately in times of market positivity. Once in a while, one of them will advance spectacularly... but the KEY is that rarely will a diversified portfolio of value acquisitions ever expose you to catastrophic loss.
The net result of this repeated acquisition of underpriced issues, with no concern about the horizon (I don't trade on margin and I make good money in my career so I have no pressure to sell any security at any given time), is that while people chasing large, unsustainable returns will risk loss of principal, you'll preserve principal and consequently see your compounded gains over time far outpace the swaggering risk takers.
Even professional stock-pickers have a very difficult time beating the broader averages over time. In fact few do.
I don't care and neither should you. What I do is boring. It doesn't make great water cooler talk compared to "Yeah, I just bought a boatload of that hot stock." But, for what it's worth, fund managers this year have done as badly as 48% losses. I'm sitting at an unrealized gain of 12.5%. I'm quite content with beating the S&P 500 historical average (9.3%). This is not a one-year feat for value investors. Read "The Superinvestors of Graham-and-Doddsville" if you haven't already. There are a number of billionaires made by value investing. Day trading has never made a billionaire.
A stock in a company with great fundamentals can go nowhere simply because the markets do not see them as growth story. Take MSFT for example. The fundamentals are great. Lots of cash, free cash flow, growth, no debt -- and yet, it's a dead stock and has been for over ten years now.
I'm fine with an issue or two going nowhere rather than going backward... Gaining isn't how you win. Knowing how not to lose your principal is how you win.
As for MSFT.... Microsoft isn't a manufacturing company. They're a software company. That is one of the intrinsic factors that makes them harder to evaluate. I have a few rules... that include no software companies, no banks, etc. I like large scale manufacturing companies in varied industries because there's a logic to the connection between working capital and operating cash flows. So I stick to that and I do outperform the broader market quite often in positive years, and I don't lose my shirt in bad years.
Take another, AAPL. In the mid-2000s it was selling for over 100 times earnings (at one point over 200). Justified? Not on the basis of any reading of the fundamentals. To buy and hold the stock at those multiples required a leap of faith, that being the company would continue to out-innovate their competitors and release wildly successful new products that nobody had even heard of yet. You will never find that information in a balance sheet, no matter how far down you dig.
Earnings is an easily manipulated figure. It doesn't tell me what the actual organic cash generating ability of the company is. Operating cash flows do. The only thing a P/E multiple ever tells you is what every other dummy was willing to pay for a stock in excess of its earnings capacity. It doesn't and will not tell you what you should pay. The key is selling to the dummy, not being the dummy.
Apple has solid operating results for many quarters past, and they have a fairly strong moat and sound management that are, based on their RSU grants and other information, incented to look out for the long term growth of the company. But the reason I sold Apple is because at their scale, year over year growth figures have to shrink because there's a real limit to share of wallet that they can acquire... and every other product they make that people want narrows that share of wallet. At $100+ billion annual revenue, it takes a much larger marginal bump in dollars to produce the same percent growth or more than last year's... and so on.
But let's put this another way. I bought Apple when a market downturn priced them beneath my calculation of their intrinsic value. Not by much but that's what Buffett calls a "one puff" stock (think a half used cigarette, maybe has one good puff or two left in it). Imagine me and some other guy both sold AAPL at the same price... but he thought $440 was what made it hot, when I had acquired it at $86 several years ago. I don't care what gain he might get in the future, because I've already moved on to the next cigarette... which currently is doing about 40%, or more than twice Apple's gain over the past year.
While others may disagree with me, the fact that I've estimated Apple to be worth about $40 per share less than what they're trading at now has not hurt me. and that's my point here. Erring on the side of caution is not a bad thing. Protecting principal, not seeking the largest possible returns, is what leads to the snowball effect. Only impatient people don't realize this... and they succumb to the Gambler's Ruin whereby they keep trading to recover losses of principal, compounding losses of principal, until they wipe out their principal.
But they never do the math on how much in future gains that loss of principal ends up costing them down the road. Every dollar of principal sacrificed to the gods of instant gratification is a dollar plus years of compounded annual interest lost forever. Let's not even get me started on those dumb enough to margin trade.
"Any number times zero is still zero." - Warren Buffett