Tesla Motors Inc (NASDAQ:TSLA) has increased the size of its convertible bond offer according to a new report from Reuters. The alteration to the deal, that would see Tesla take on debt to pay for capital expenditure, and pay off its Department of Energy loan, is unusual, because the company only announced the original bond offering yesterday, after the market closed.

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The original deal would have seen Tesla Motors Inc (NASDAQ:TSLA) offer $450 million in convertible bonds that would come due in 2018. According to the Reuters report, the company has increased the size of the offering to $525 million, though the reason for the increase in the size of the offering was not immediately clear.

According to the Reuters report, Tesla Motors Inc (NASDAQ:TSLA) also clarified the pricing of the bonds, and their convertibility. Price talk has been changed to 1.5%-2% with the conversion premium fixed at 35%, down from 2%-2.5% and 30%-35% conversion that came with the original offering.

The bond offering was part of a new capitalization deal that will also see the company sell 2.7 million additional shares. Tesla Motors Inc (NASDAQ:TSLA) founder Elon Musk agreed to buy $45 million of the new shares in a move that was greeted with enthusiasm, as it showed the confidence he had in the firm, even with the high value it is trading at.

Reinvestment In Tesla Motors Inc (TSLA)

After the announcement of the capitalization deal, Tesla Motors Inc (NASDAQ:TSLA) jumped sharply in aftermarket trading. It appears that investors were excited about the possibility that the company might be able to pay of its DOE loans, and reinvest some of the extra capital into expansion that might be necessary going forward.

On today’s market, including the spike from yesterday’s close, Tesla Motors Inc (NASDAQ:TSLA) shares have increased by more than 9% and have ticked upward since the announcement of the expansion of the bond offering. Tesla Motors Inc (NASDAQ:TSLA) shares have been on an incredibly run in 2013, gaining more than 170%, and investors can still get optimistic.

The reason for the additional offering of bonds may be because of the positive reaction to the first round. Tesla Motors Inc (NASDAQ:TSLA) is expert at harnessing public opinion, and it seems that the firm is able to translate those skills into harnessing investor opinion. That is a dangerous line to walk, however.