Retirement tax questions

So if I understand what you're saying.   I put money in my traditional IRA back many years ago and therefore didn't pay income taxes on that money going into the account.  Then I use some of that money and invest it in a Company.  The Company pays interest into my account on that loan.  I pay taxes on the money I take out.  So far this is all standard.  But now the Company goes bankrupt and the money I invested in them is lost.  You're saying, That lost money is just gone and I can't even deduct any of that investment loss on my taxes?