> For the complete documentation index, see [llms.txt](https://docs.godex.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.godex.ai/getting-started/shark-vault/whats-a-bullish-shark-vault.md).

# What's a bullish Shark Vault?

<figure><img src="/files/kpchc4hiZYezcb0ehZYC" alt=""><figcaption></figcaption></figure>

A user would subscribe to bullish Shark Vault when they expect the price of BTC/ETH to rise. The price of BTC/ETH at the end of 7 days will be taken to decide the final APY to be paid out.The earnings are calculated using the following formula: Subscribed amount (1 + APY \[7/365]). Estimated earnings can also be calculated on the Shark Vault subscription page, during the subscription period. The 3 scenarios are:

1. Below the range - basic APY%
2. Inside the range - between low APY and high APY depending on the price
3. Above the range - basic APY%

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Here's a hypothetical situation where:

* Subscription amount: 1,000 USDT
* APY: 1% - 18%
* Term: 7 Days
* BTC price range: $18,000 - $21,000

Note: This example is presented for illustration purposes only and does not represent the future APY.

### **Examples of scenario**

**Scenario 1:** Below the range Expiration price = $17,000 < $18,000 , APY = 1%

*Subscription amount x APY x 7 / 365 = Earnings*

Example: subscribed amount x (1 + APY x \[7/365]) = 0.192 USDT (Earnings)

**Scenario 2:** Within the range Expiration price = $19,500, within $18,000 - $21,000 , APY = 4% + (19,500 - 18,000) / (21,000 - 18,000) x (18% - 4%) = 11%

*Subscribed amount x APY x 7/365 = Earnings*

Example: 1,000 x 11% x 7/365 = 2.110 USDT (Earnings)

**Scenario 3:** Above the range Expiration price = $24,000 > $21,000 , APY = 1%

*Subscribed amount x APY x 7/365 = Earnings*

Example: 1,000 x 1% x 7/365 = 0.192 USDT (Earnings)