Why N.M.P. Trump refused to release his tax returns

BTW, N.M.P. stands for Not My President in case you were wondering.

Recent developments have combined to paint a picture for me which may explain a conundrum as to the reason Donald Trump would risk losing a portion of the electorate by refusing to release his tax returns. This decision can only be explained by the metric that to refuse to release would have less adverse impact than to release. To refuse to release, meant losing some votes. To release, could mean going to prison.
Let me explain.
During the 2016 campaign Trump was winning primary after primary and as he got closer to the nomination people started getting more and more concerned about seeing his tax returns. The higher he got in the campaign, the harder people pushed to have him release. It's entirely possible there are certain business deals outlined in them which could be hard to explain especially if they are going to be scrutinized word for word and down to the penny by people who are not big fans of his like the SEC or Securities and Exchange Commission not to mention the NYSE and NASDAQ and lawyers working with other candidates. I'm talking stock manipulation or insider trading which is what got Martha Stewart some time behind bars. There's an old saying, "It Takes A Thief To Catch A Thief." It also takes a Stock Trader to catch a Stock Manipulator. I've been trading stocks & bonds since 1967 and I can spot a "Pump & Dump" or maneuver to either raise or lower a stock price pretty damn quickly. Judges have been caught up dabbling in stocks of companies which run "for profit" prisons. It's easy for them to enhance their portfolio by incarcerating offenders by the bus load.
For a president who may be invested in steel companies like US Steel symbol x or AK Steel symbol AKS or Alcoa Aluminum symbol AA or a raft of other companies to make his holdings go through the roof by imposing tariffs on imported steel & aluminum. Maybe he has a position in Whirlpool which would explain a tariff on washing machines which had to be the strangest move imaginable. That was what got me wondering WTF is the logic behind that? Maybe he holds a large block of stock of a domestic manufacturer of solar panels. Who knows? A look at his tax returns and his 1099's would show that in less than a minute. Import tariffs would also affect his other businesses.
Electing a businessman with billions invested in corporations just may be the worse decision a country can make. Corruption isn't restricted to 3rd world countries by any means.
If I'm right, and I have very little doubt I am, the American voter will never see Donald Trump's tax returns. At least not until the statute of limitations on securities fraud runs out. It could mean swapping his luxury digs at Trump Tower for a cot at the "Tombs" in NYC.