overtrade

from The American Heritage® Dictionary of the English Language, 5th Edition.

• intransitive verb To buy and sell securities too frequently, resulting in excessive volatility or high transaction costs.
• intransitive verb To exceed the ability of a business to finance its operations by increasing sales too rapidly.
• intransitive verb To buy and sell securities in (a market) too frequently.

from The Century Dictionary.

• To purchase goods or lay in a stock beyond the means of payment, the needs of the community, or one's means of disposal to advantage.

from the GNU version of the Collaborative International Dictionary of English.

• intransitive verb To trade beyond one's capital; to buy goods beyond the means of paying for or selling them; to overstock the market.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• verb To trade beyond one's capital; to buy goods beyond the means of paying for or selling them; to overstock the market.