O Definition

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O as the fifth letter in a Nasdaq stock symbol indicates that the issue is second class of preferred shares in the company.

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MARK-TO-MARKET (MTM) is the recording of the price or value of a security, portfolio, or account on a daily basis, to calculate profits and losses or to confirm that margin requirements are being met. This is done most often in futures accounts to make sure that margin requirements are being met. If the current market value causes the margin account to fall below its required level, the trader will be faced with a margin call. Mutual funds are marked to market on a daily basis at the market close so that investors have an idea of the funds NAV.

ARREAGE is unpaid dividends on cumulative preferred stock.

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